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=== Patient zero ===

Leonhardt tried wiping the sweat off of his forehead, forgetting that he was wearing a hazmat suit to protect himself from the potential effects of the substance he was working on. He was in his late sixties, was bald except for the scarce white hair on the sides of his head. Age has been getting to him as of late; the hazmat suit he wore over his lab coat was helping hide his slight hunch and although his joints ached, he still carried on his job in the name of science. He temporarily stepped away his microscope to take a break. The lack of significant discoveries or any other form or result was taking a toll on his morale. It had been already half a year since he started working on this project and yet, his team and he hadn't had any results to show. The government had hired him and other top scientists from all over the world; Leonhardt had received many prestigious awards in various scientific fields like chemistry, biology, physics, mathematics and astronomy. This gave him the position of chief of operations and he was thus leading the research in this top secret laboratory. He wasn't necessarily happy about working for the military, but they had promised to fund any research he wanted to start once he was done with his contract with them. Being a man of science, he accepted; it never was a matter of money for himself, it was a matter of scientific knowledge.

The scientist leaned back on his seat. Every time he worked on these samples of unknown composition that the military had asked them to analyze, his mind quickly got foggy. He had asked his employer, the government, many times to look at his suit to check if the air filters were working correctly, and the only answer that was given to him was the same lecture about how their equipment was top quality. He closed his eyes and let his mind wander around for a moment. As every time when he took a small break, disturbing images of giant anthropomorphic animals with huge genitals were popping in his mind. It wasn't always like this; when he had started this research, the images were blurry and only appeared to him rarely, but they progressively got clearer and more frequent as time went on. Leonhardt wondered if it was the repeated exposure to this weird substance that had this effect on him, but he opened his eyes before the large hyena-man in his mind got to business. These flashes had always disgusted him, and the more he studied these samples, the more these images assaulted him. They used to invade his mind only when he worked on the substance, until a morning a couple days prior where he woke up with a raging hard-on and his underwear was drenched in cum. Pushing these annoying thoughts aside, he leaned over the microscope to take another look at the samples with the hope of finally finding something useful.

Leonhardt wasn't able to focus on the sample, images of that giant hyena and his massive penis were coming back to him. It was becoming harder and harder to repress these thoughts. He let go of the microscope and fell back on the chair, readjusting the bulge in his pants. It was enough for today, he was struggling to focus too much to be productive. He started putting away everything: he threw the sample slide away in a bin for hazardous waste, he turned the microscope off and picked up the bottle of the alien liquid before standing up to go put it back in the freezer. As he was walking there however, images of that hyena man completely overwhelmed him. He brought a hand on his heart and gripped tightly at his chest. It was now more than just a psychological reaction to the substance, it was physiological too. He took heavy step after heavy step towards the freezer, huffing loudly as he felt like his head could explode. Every time he was blinking, the bulky man was appearing to him, holding his hand out to the scientist while stroking his enormous cock with his other hand. Leonhardt was tempted to reach out to him, but he knew the monstrous creature wasn't real and that it was but a product of his imagination. He however subconsciously extended his hand toward the guy and when he realized it, he quickly withdrew it. He closed his eyes, shook his head and asked “would you please go away?" When he opened his eyes again, not only did the anthropomorphic hyena image not go away, but it now looked like he was standing in the middle of the room. The monstrous beast shrugged before he pointed at the bottle in the hands of the scientist while grinning. Completely ignoring the fact that he was now hallucinating about the stud being in the room, he looked at the bottle in his hands. He then pleaded “please, whoever you are, leave this tired old man alone..." and then went back to walking slowly. It felt to him as if every step was harder than the previous, and that they were making him get further away from the freezer and closer to the monstrous guy. He brought his hand at his forehead as images of that sexy hyena in all sorts of lewd situations popped up in his mind. At some point, his glasses fell off his nose and he was having trouble focusing on his surroundings. Every step felt like a trial, a challenge where his will was put to the test.

A sudden shattering noise brought Leonhardt out of his trance. The hyena disappeared and everything became clear again. He was confused as to what had happened and the first thing he did was to look around for his glasses. They had fallen down his suit and were lying on top of his right foot. The scientist sighed as he knew that with his hazmat suit on, he couldn't grab his spectacles. He tried remembering about what he was doing before the images of that creature appeared to him and let out a loud curse was heard as his eyes fell upon the glass of the broken bottle on the metallic ground of the laboratory. He crouched to look at the damage and was horrified to see that several fragments of the broken container had flown and torn his thin suit. He realized that it wasn't safe for him anymore and even though he wanted to run and ring the contamination alarm, he took a few deep whiffs of the scent that invaded the air he was breathing. The images came back in his mind, stronger than ever, and no matter how hard Leonhardt tried resisting the temptation, his body wouldn't budge. The old man fell on his knees which splattered in the weird substance, scooped a bit of the liquid with the tip of his finger and brought it in front of the head part of his suit. He tried bringing the fluid to his mouth, but his finger was blocked by the plastic shield and the liquid spread over it. Frustration grew in the scientist, who wanted to have a taste of the liquid. He quickly brought his hand back down to scoop more, but succeeded only in tearing more of the suit as a shard of glass pierced through and cut his palm. Leonhardt screamed and launched himself backwards, landing on his butt. Thanks to the pain in his bleeding hand, he was once again brought back from his trance. He quickly got on his feet and ran to the emergency panel, opened it and slammed on the big red button to ring the alarm. All the doors were locked instantly and thick bars slid in front of the door to prevent any escape.

“G-good..." whispered the scientist. “Now... if this stuff is dangerous... I'll be the only casualty..." he huffed loudly and brought his hand in front of his face to look at his wound. His hand was completely normal, except for his nails that were longer than what he remembered them to be. “No... no! That wasn't why I... I pressed this... Agh!" he took his head in his two hands, his longer and sharp nails tearing the thin suit as he ran then down against his skull. “Now... now no one will bother me!" he said, tearing apart the head portion of his hazmat suit.

As soon as his head was freed, he took a few deep inhalations, enjoying the thick scent in the air. He quickly tore apart the rest of his suit with his darkening and elongating nails and then headed towards the small puddle of the fascinating liquid. He knelt in front of it, scooped up just a tiny bit of the substance with his finger and slowly brought it in front of his head. As he was opening his mouth, he hesitated a moment. The internal battle between common sense and intoxication was raging on and Leonhardt was trying his best to resist it.

“Do it!" said the hyena from earlier.

“No! I will not!" shouted the scientist “This is dangerous!"

“But you will love it, Leonhardt!" replied the beast.

“H-how do you know my name, you monster!" asked Leonhardt.

“Because I am in your head, Leonhardt, I know your inner desires." replied the scientist to himself, “you cannot fight it, you should just accept it!"

At this moment, Leonhardt thought he was going insane. Very slowly, he was approaching his finger to his mouth, unable to resist any further. He closed his eyes to try and focus on fighting the urge to give in, but as soon as the liquid touched his tongue, he stopped resisting. He closed his lips around his finger to lick at it and suckle on it. The intoxicating taste quickly spread in his whole mouth and while the voice of reason was screaming in terror, his inner desire was revelling in satisfaction and pleasure. The only thing that mattered at the moment was the intense bliss that spread throughout his body and sent waves of pleasure to his brain. The scientist could feel his body pulse and heat up as he suckled on his own finger, trying to milk it from every single particle of the weird liquid. He then opened his mouth and whined as there was no more to drink from on his finger, before marvelling at the view of the puddle below him. He planted his hand in the sticky fluid, not caring about the fragments of glass in the slightest and wondered if he had always been this hairy before. That thought was however completely irrelevant to him, so he brushed it aside before bringing his hand in front of his face. His palm and fingers were all dripping with the delicious liquid. He approached his hand closer to his nose to take a big whiff of the strong scent that came off of the sticky substance, making his fully hard cock throb. Almost instinctively, he let his tongue out to lick at the palm of his hand, and as soon as he swallowed his first mouthful, the scientist was brought to orgasm. His cock began shooting string after string of cum that dripped in his underwear, the sheer pleasure that he was feeling was so intense that he could not resist this any longer. He began ravenously licking at his hands, suckling on his drenched fingers one at a time and running his tongue against his palm.

When the scientist's hand was cleaned of the substance, he brought it to the puddle to scoop more again, this time coating not only his palm but also the back on his hand. He noticed that his fingers were much larger than before, that they were slowly covering in with thick hair and that his palm was growing some weird looking padding. As soon as he brought his hand to his mouth again, the scientist came again and his cock began shooting cum once more. The load was even more impressive than before, completely drenching his underwear, which was bulging larger with every second. Leonhardt was too lost in pleasure to realize, much less analyze, what was happening to him. His ears were getting pointier and longer, his nose was flattening and the lower part of his face was elongating ever so slightly. He felt at the back of his pants a little uncomfortable, there was a small nub of flesh that was growing and pushing back there. Hair began sprouting all over his body, even covering his previously bald dome, and took on a light grey tone. The structure of his feet changed drastically, slowly morphing into a digitigrade structure while his toes elongated and grew massively, bursting out of his black shoes. As he was suckling on his thumb, he felt his teeth change and get pointier, he felt his tongue flatten and lengthen. His ears were moving ever so slightly upwards on his head, morphing into a canine ear shape and improving his sense of hearing. His nose reshaped into a black nose, while also increasing hundredfold the potency of his sense of smell. The transforming scientist opened his eyes as he was done swallowing the coat of the alien liquid that was on his hand. He was surprised to see a large snout partially impairing his vision down, yet was pleasantly surprised when he realized that he was seeing his hand clearly without even needing glasses anymore. A part of him was desperately trying to hold back his desires, but was failing miserably at it.

Thanks to his improved vision, the half-transformed scientist picked all the fragments of glass off of the puddle and threw them away before scooping as much of the liquid as he could and pooling it in his hands. He brought the makeshift bowl to his lips and began drinking the substance in small sips, and he was once again brought to yet another orgasm. His dick was undergoing changes while shooting cum, expanding in length and girth and slowly transforming into a bright red shaft. A rather large ball of flesh started growing at the base of his cock, gaining more width with every pulse until it was a decently sized knot that kept on getting bigger. With every time he swallowed some of the weird substance, his body pulsed and grew slightly. The scientist grew a few inches at first, while packing on more muscle and gaining a wider frame, he went from scrawny to thin, then to fit and then muscular. Clothes were straining around his broadening frame, outlining his growing muscles and expanding body. At that point, his underwear was completely flooded in cum and the tent from the sheer size of his package was straining his soggy pants. The sleeves of his shirt and his coat ripped open around his strengthening biceps, his pants exploded in fragments of fabric around his expanding calves and thighs, his belt snapped as his hips grew broader and out of the back of his pants burst his newly grown fluffy tail and his growing glutes. His pectorals grew beefier, his nipples expanded in width, straining even more of the poor creaking fabric of his shirt and his abdominals grew into a muscle gut, though there was a massive eight-pack hidden beneath the thin layer of fat. The gray wolf's underwear snapped, freeing the enormous package that was held within. The thick knotted cock bounced up, slapping against the belly of the beast while shooting more seed which splattered against his own chin. His cantaloupe sized balls finished the job of tearing apart the underwear and fell down almost to the ground, dangling and sloshing with the impressive amount of cum that was produced within. The puddle of substance was disappearing fast as Leonhardt was scooping an ever increasing amount thanks to his bigger hands, and began drinking even more thirstily than before. Now freed from any restraint, the anthropomorphic wolf grew faster than before. All of his muscles bulged with power; his arms, pectorals, shoulder and back were affected most by the changes. The more he grew, the thicker his fur became. His neck was being covered with an almost-mane like fur that grew down to his chest, between his pectorals and creating a treasure trail down his pelvis. His eyebrows grew brushier, the underside of his jaw covered in more fur, his armpits too gained this thicker hair and finally, his balls were covering with this fluffier fur. His beard, eyebrows and the surrounding of his muzzle were all whiter than the rest of his fur as a sign of the wolf's old age, even though he didn't look old at all except for this whitening fur. His body continued pulsing with strength and power, making him grow bigger, to gigantic proportions. Each of those throbs was in sync with the ones from his dick, which also sprayed seed all over the place while expanding in length and girth. It soon grew large enough to reach between the pectorals of the wolf, and was still swelling and shooting an ever increasing amount of cum. Leonhardt licked the last of the alien substance that was still on his hands, and his whole body swelled bigger one last time, bringing him to 8'2 tall, with a 3'6 long and wide cock whose tip was reaching right in front of his nose. His massive knot was the size of two large watermelon side by side, and each of his balls was two feet wide.

With his snack on the alien substance finished, the wolf's orgasm came to a close. Leonhardt was however not done yet, he brought his hands to his shaft to work on it and started licking the tip, occasionally sealing his lips around the slit to drink his own cum. When his previous orgasm was about to end, another began, making him howl loudly while his shaft sprayed seed all over the laboratory.

=== Alert ===

Three men were sitting on the same side of a table in a room, another man was standing next to it with his palms put down on the furniture. The tension was palpable in the air as all of them were looking between large steel bars and through a thick glass into another room where a giant anthropomorphic wolf was held captive. Leonhardt was sitting on a table – this was the only thing he would fit on given his huge size – and was chained up with his hands being held behind his back.

“I will ask you not to investigate into why this happened, gentlemen." said the man who was standing next to the table. He was a tall and muscular man in his mid fifties, had greying black hair, a moustache that was well taken care of, a large and square jaw that was covered in a short salt and pepper coloured beard. He wore a military attire decorated with many medals and had a deep voice and spoke in a serious tone. “I will however ask you to try to find a cure for this."

“Of course we will. Science shall prevail, General Admic!" said the guy sitting in the middle seat of the table, Dmitri. He was a man in his late forties, had brown hair and was in pretty good shape for a scientist. He was a chemist renowned in the whole world that was working as the head of the chemistry wing of the laboratory, and he had been working directly under the orders of Leonhardt, who he was good friends with. “It was in our contracts to not ask questions and to do as we're told, but I cannot stand looking at this. If that... thing... really is Leonhardt, then we must do everything in our power to undo that."

“Are you crazy?" replied Gregor, the man sitting on the seat furthest away from the general. Gregor was a man in his late fifties, a tall and slightly chubby guy. “This is madness, there no cure for whatever happened to that poor excuse for a scientist!" he added. Gregor was a genius biologist with questionable work ethics; he and Leonhardt had never been on good terms before. “I say we begin the emergency protocol and escape before burying that monster!"

“Watch your mouth, Gregor!" yelled Dmitri, offended, “if it was you there, you wouldn't have been saying that sort of nonsense!"

“I don't need to take advice from a-“

“Quiet, you two!" intervened the general. His threatening tone was enough to shut the two arguing scientists up. “Isaac, what do you think about this?" he then asked to the young man, who was sitting in the seat closest to him.

Isaac was a physicist who had graduated from university with a doctorate on DNA manipulation on multicellular organisms. When the government had offered him a job paying seven figures right out of school, he eagerly accepted, not realizing what he was getting himself into. “As long as there is a chance that we can bring him back, I'd like to try."

“What do you think are the chances of success?" asked the general.

“Slim, but not zero." replied Isaac. He didn't want to keep the army chief's hopes up, but he wanted to believe there was something they could do to help.

At that moment, Leonhardt growled. Despite the sheer amount of tranquilizers that were running in his blood, he managed to raise his head to look at the thick glass. He knew the four men were on the other side and he knew they were hearing him. He began giggling and then laughing loudly. His creepy laughter lasted for a good minute before he finally calmed down. The wolf flicked his ears and licked his lips. “You'll need more than that to keep me down, little boys. You can't tame daddy that easily." already, his large shaft was poking out of his plump sheath and pre was pearling on the tip, dripping down the length of the hardening fleshy spire.

“It spoke!" yelled Gregor, who rose up from his chair and pointed at the glass. “That monster spoke!"

“Gregor, this is your last warning, stop this nonsense! If he can still speak, it means that we'll be able to discuss with him. Leonhardt, what happened to you exactly?"

“Well you see," replied the wolf, “there was this dormant beast in me, and I just let it loose." A powerful throb rocked through his shaft, which hardened two inches and spurted a large amount of pre. It was already standing at half mast and was growing harder with every second. “And it feels fucking great, you should try it!"

“Leonhardt, I am asking you a serious question." said the general with a stern look on his face. “What happened exactly at the lab, why did you ingest the substance when we explicitly told you to avoid contact with it?"

“Because it tasted good, obviously! I know you'd love it too and I know of an extremely easy way for you to have a taste of it. Look," replied the wolf, whose erection was fully hard at this point. Without breaking eye contact with the opaque window, he let his tongue out and leaned slightly to take a long lick at the tip of his shaft, which began spewing more pre. When he reached the leaking tip, he sealed his lips around it and suckled hard to drink the pre. He then let go of it and licked his lips before he teased the four men again “See? Just like that. It's that simple. Come on, give it a try, I know you'll fucking love it. You'll all be on your knees and begging daddy for more before you know it!"

The general sighed heavily as the interrogation was going nowhere. They were all interrupted by the emergency phone ringing. Visibly annoyed by the disturbance, the general went to take the call. “We are in an important meeting, make it short." he immediately said. After a few seconds, his expression changed to one of disbelief yelled “They WHAT? Is this some kind of joke?"

A long silence weighed on the room as all three scientists were looking at the general, whose face was progressively changing to one of horror. While they were all busy with that phone call, Leonhardt easily broke the chains that were restraining him. His cock was pulsing and throbbing wildly, shooting small ropes of pre that dripped down on his shaft, then balls and finally, on the ground. He brought one of his hands on his massive fleshy spire to start rubbing it while he used his other hand to get up from the table. He took a few steps towards the reinforced glass, all while working on his cock by licking its tip and by caressing its swollen knot with both hands. As soon as he was right in front of the barrier between him and the other four men, he let go of his shaft to bring both his hands to the metallic bar. With one impressive show of strength, he flexed his muscles and effortlessly bent the steel to free the way. He then encircled his cock again with his whole arm and he balled his other hand in a fist that he prepared to throw against the glass.

“Men, we must evacuate." said the general with a look of shock on his face. He turned to look at the scientists and saw behind the three that the giant wolf was preparing to throw a punch at the glass. “Watch out!" said the general, grabbing Isaac and Dmitri to pull them both.

Fragments of glass flew across the room and Leonhardt aimed the tip of his throbbing cock right towards the opening he had made. He had made sure he was ready to coat everything with his seed before punching the glass and reached orgasm as soon as his shaft was in place. The massive cockhead erupted, firing an immense amount of cum that splattered all over the wall and splashed all around. The general was able to pull away both Isaac and Dmitri away from the blast, though Gregor wasn't as lucky as the other three. He had avoided the splash of seed, but with every part of the wall drenched, he was had no chance to join the two others.

“Let's get out of here!" yelled the general.

“Wait for-“ began Gregor, who was interrupted by a second gigantic blast of cum landing on the wall right next to him. Despite dodging the initial shot by leaping backwards, the splashes from the impact of the shot had sent lots of globs of cum flying all over him.

While the three other men had also been splashed with some of the sticky fluid, they were nothing more than droplets. The general quickly opened the door and ordered both Isaac and Dmitri to follow him out of this place. As the second huge shot of cum from the wolf was weakening, Gregor took his chance and tried jumping over the massive puddle of cum to join the other three. A third blast of seed erupted from the wolf's cock at the exact moment when the biologist was in the air, and Gregor unable to dodge. The shot of cum was so powerful that the scientist was sent flying and landed on the coated wall before slowly slipping down on the ground. He tried removing some of the sticky fluid that was all over himself, but before he had been able to even remove anything from his face, another jet completely coated him.

Gregor saw the door close as the three other men had fled. “No! Please, don't leave-“ he tried to speak, but was silenced as another blast of cum showered him, some of it even reaching into his mouth as he was trying to plead for his life. As the door closed and the emergency lock was put down, Gregor coughed to try to get rid of the seed that invaded his mouth.

The biologist felt dizzy and light-headed, he wanted to get out of the shower zone, but couldn't because of the slippery mess. The warm liquid kept on drenching him, adding coat after coat all over his soaked body. He was struggling to get out of there, and yet, it felt as if he wanted to enjoy the shower. He hated how it tasted and he was desperately trying to restrain this compelling need to lick and lap at the substance, he wanted to feel disgusted and repulsed, but the only things he could feel were satisfaction and greed. Despite all of these conflicting emotions in him, he hoped and wished that every blast of cum that fell upon him was the last. And every time he thought it was over, he was proven wrong as another blast of cum showered him.

After a five minutes long shower of cum, the wolf reached the end of his orgasm. He grabbed the partially shattered glass and finished the job, completely breaking the whole thing before stepping inside the room where the scientist was struggling to get up from the ground. Leonhardt walked close to the massive puddle of cum, grabbed the base of his cock with both hands, squeezed it and ran his fingers up. The seed that was still stuck in his urethra was forced out and fell directly on top of Gregor's head. The scientist slowly raised his head and looked with a mix of disgust and admiration at the giant wolf that was towering over him.

“What... ugh..." said Gregor, who was having trouble articulating. “did you do to me?"

“Don't fight it, Gregor. You know," said the giant wolf, “I've always hated you. But I'm willing to give you a second chance, and this is exactly why daddy chose you."

Gregor brought his hand on his chest as he felt his heart pulse in his chest. The musk, the smell, the taste, the look, everything in Leonhardt's new body had something so deeply and inexplicably enticing to the small scientist. He was struggling to keep it together and he was slowly getting up on his knees before he saw a massive furry hand being extended at him. He hesitated for a long while before he approached his own hand to Leonhardt's. Upon seeing the biologist's reaction, the wolf grabbed forcefully Gregor's wrist and pulled it up to make the human stand on his feet. He then led Gregor's hand to his cock and made it rub it, which caused the shaft to spew a massive glob of pre that dripped down on the human's hand. Surprised by this, the chubby man pulled away and stepped backwards until his back was against the door. While he was terrified by the wolf, there was one thing that he couldn't deny. His body wanted that wolf very badly, his cock was throbbing uncontrollably and leaking lots of pre. His clothes were dripping with cum and the look in his eyes was one of terror mixed with extreme arousal. He quickly turned towards door and tried opening it, banging on it, yelling at it and cursing the others for giving up on him.

“Face it, Gregor, they've abandoned you." said the wolf, who was very slowly stepping closer to the scientist, “but you know what, Gregor?" He was at this point right behind the chubby man, with his cock pressed against the human's back. “Daddy won't abandon you. Daddy will make sure you'll get plenty of love." just as he said that, his cock leaked a large drop of pre that dripped down on the underside of the fleshy spire before coating Gregor's head.

The warm liquid dripped all over Gregor's face, and when the liquid reached his lips, he licked them clean to have another taste of the wolf's intoxicating juices. As soon as the taste of the pre hit his mouth, Gregor was brought to orgasm. The human moaned loudly as his cock began shooting cum, adding to the already immense mess that was on his clothes. After his orgasm faded away, Gregor turned toward the giant wolf and opened his arms to wrap them both around Leonhardt's shaft. Even though his mind was screaming to get away, his body was moving on its own accord and began working on that giant lupine cock. Before he could even realize it, he had started licking the shaft.

“That's right, boy, make daddy proud of you!" growled Leonhardt.

Hearing that deep rumble coming from the wolf brought Gregor to another orgasm and made him crave for more, he felt like he had to please the giant male in front of him. His nails grew longer and thicker, his whole body slowly grew more hair, his ears became rounder and wider, his shoes were feeling confining around his feet. He knew something weird was going on, he had a feeling that he needed to avoid it, but at the same time, he wanted to please the wolf and get praised by him.

“Don't fight it, Gregor. You'll fucking love it."

Every word felt like a reward for the human. Every time he tried to fight off the need to worship the monstrous wolf, he heard grunts or huffs that made him desire more. The scientist began licking the large drops of pre that were dripping down the length of the shaft, which had the effect to accelerating the changes that were going through him. Grey hair grew at a fast rate all over his body, his nose surged forward and slowly became a snout, his tongue expanded and a nub of flesh grew on his lower back. The few second thoughts that rose in his mind were quickly quelled by the wolf's voice, which felt soothing to Gregor's transforming ears. Every second he grew bigger and larger, his body fat receded and his muscles swelled, and his desire and lust went through the roof. Clothes were straining around his ever growing frame, his shoes burst in pieces as his feet outgrew them and his belt snapped as it was unable to contain the growing monster beneath. All of this made Gregor cling tighter around the lupine shaft while working on it ever faster and licking the pre off of it more ravenously. The back of his pants tore apart, revealing a long furless tail that flopped free and thrashed around. His biceps grew so large that the lab coat ripped around it, his pectorals became wider and stronger, making the scientist's shirt snap at the seams, and his calves became so huge that his pants exploded around the growing mass of muscles. Every piece of his body that was freed from the restraining clothes burst outwards, showing his thick gray fur. At this point, the thick pelt covered his whole body except for his hands, feet, tail, ears and his cock that was still concealed in his strained underwear. Long whiskers grew on the sides of his muzzles, his front teeth grew a bit longer. The more he grew, the more his clothes were shredded in rags that fell off his body into the large puddle of pre that was expanding on the ground. As the transformation and the growth came to a close, Gregor was approaching a height that'd allow him to suck on Leonhardt's dick. He opened his mouth wide and attempted to dive on that leaking tip, but a hand landed on his forehead and prevented him from sucking the cock.

“You've become a very good looking rat, Gregor." growled Leonhardt.

“I won't let you insult me like that, Leonhardt, you've always been-“

“Look at yourself, you fucking dumbass," interrupted the wolf.

Gregor let go of Leonhardt and brought his hands in front of his eyes. He was surprised to see long claw-like nails and he looked to his grey-furred wrist before lowering his head. Something poked him on the underside of his chin, so he brought his hands to move it, but as soon as he touched it, an immense wave of pleasure invaded his mind. He pushed it away and took a good look at it, it was his own massive cock. Unlike Leonhardt's, his shaft had retained roughly the same shape as when he was human. He moved it aside, trying hard not to cum yet, and looked at himself. He was now standing at 7'6 tall, his shaft was reaching to 2'8 in length and he had a thick gray fur covering almost all of his body. His toes were much longer and larger than before and sported large claw-like nails, and his furless tail was long and thin. He had massive muscles all over his body and while his upper body wasn't as well built as Leonhardt's, his legs packed much more strength than the wolf's.

“Whether you like it or not, you're a rat now." said the wolf with a grin, “a mighty fine specimen, I'd say. Daddy can't wait to make use of that sexy new body of yours, but you know, Gregor, just sucking on daddy's thick and juicy cock won't be enough..."

“Holy fuck! I've really become a rat!" said Gregor with a deep and manly voice, “How's that even-"

“Possible? Who cares, Gregor," rumbled Leonhardt deeply “all that matters is that we're giant studs with big meaty cocks. And huge balls that need to be emptied often." he added while grabbing the rat's nuts and giving them a squeeze.

“Ffff-fuck!" squealed Gregor. Even his squeal was like a low manly rumble. “Y-you're right. My balls feel like they're going to explode!"

“Then imagine how mine are right now, Gregor. You've been teasing me for so long that even if you were to suck my thick cock, daddy wouldn't be satisfied!"

“So what?"

“Daddy want your ass, Gregor. I'm gonna destroy your ass and fill you with so much cum that you're gonna look like a balloon! Don't worry, daddy will make sure it'll be enjoyable for you too..."

“So you're finally gonna get serious?" sneered the rat. “I've been waiting for that all along, you dumb mutt." he then turned and leaned against the wall, lifting his large butt up high for the wolf to see. “Come on, I want all of it. Every. Single. Inch. Shove that monster in me. Show me just how much cum your balls can hold."

Leonhardt didn't need to be told twice. He grabbed Gregor by the butt with one hand while using his other to position his enormous shaft against the rat's asshole. The wolf's cock throbbed powerfully from anticipation, making it leak a huge drop of pre that Leonhardt used as lube. He instantly shoved the tip whole inside the rat's awaiting hole. Gregor moaned loudly at the intrusion, and his cock shot a large amount of pre that splashed all over the wall in front of him.

“Hope you're ready for more," said Leonhardt as he let go of his shaft to grip Gregor's waist, “because daddy's gonna fuck you raw."

“Then stop teasing me and do it." groaned Gregor, “hold nothing back, go wild, destroy my hole, but stop teasing and just do it."

“You asked for it." sneered Leonhardt.

The huge wolf shoved half a foot of his giant shaft in one go, before pulling it all out and pushing in more with the next thrust. He was holding the rat so tightly that his claws were almost digging into his skin. The rat was grunting loudly, and with every time lupine cock was shoved in his ass, his own shaft blasted a large amount of pre all over the wall. Foot after foot of meaty spire slid inside the rodent's ass, making both of the males moan and groan from the intense pleasure. The shaft was so large that it was forming a sizeable bulge inside the rodent's belly and chest. At some point, every thrust from the wolf made his huge knot slap against the rat's butt. The two were losing themselves to pleasure, and their grunts slowly became manly moans and growls. The wolf leaned and took the rat's shoulder in his maw, biting into it possessively. He was close. He felt the rat's butt clench around his shaft in response to that, and it brought him so much pleasure that he came. His balls gurgled as they started expelling an immense amount of cum that ran through the wolf's shaft and into the rat's belly. The rush of warm liquid into the rodent, along with the stronger throbs from the shaft, brought Gregor to orgasm too. His cock began firing torrents of seed all over the wall, completely painting it white. Gregor's belly began expanding with the huge amount of fluid that was pumped into it. Leonhardt was so lost in pleasure that he forgot about his initial plan and began humping again, making the rat's hole spread wider around the knot with each one of his thrusts.

When finally the wolf was able to slide his massive knot inside the rodent's ass, he let go of Gregor's shoulder and howled loud as he reached another orgasm. His shaft reached all the way into the rat's mouth and all the shots of cum that were fired made it look like Gregor was cumming form his mouth. Seed spewed from both his cock and mouth, completely drenching the wall in from of him with both of their combined loads. Gregor leaned slightly and wrapped his maw around his own dick, making the two cockheads touch in his mouth. With the two huge shafts firing an immense amount of cum in him and with his mouth partially plugged by his own shaft, the tremendous flow of seed had little room to escape. The rodent's lips distended as they sprayed seed everywhere in front of him and because that leakage wasn't even remotely comparable to the input of cum in him, it began splurting from his nostrils in two steady torrents that completely drenched the wall in front of him. Even when his own orgasm faded, the flow of seed was still incredible. Gregor let go of his own cock, freeing the way for the impressive amount of lupine cum to escape. The flow of seed could finally escape through his mouth alone, freeing his nostrils that began dripping the residual white fluid. After what seemed like an hour of constant cumming, the wolf's orgasm finally weakened. The two giant males spent the next few minutes huffing and panting. Leonhardt began the difficult task of pulling his knot out of the rat's ass, they had, after all, other guys to share their gift with. As soon as the giant ball of flesh slid outside of Gregor's butthole, the wolf slid the rest of the shaft little by little until it sprang free. Now that it wasn't plugged shut anymore, the rodent's ass was gaping and leaking a large amount of cum all over the already soaked ground.

Leonhardt pushed the rat away to free the way to the door, put his hands over it and ripped it away, opening the way to the outside. There, he found the coats of Isaac and Dmitri, and the vest of the general, which were all splattered with cum. The wolf assumed that they had done this to get rid of the smell and seed, but that worked in his favour. He grabbed the coats one by one and brought them in front of his nose to take a few deep whiffs and engrave the smells into his memory. He then threw the clothes to the rat so he could do the same.

“I know their smell, now," said Leonhardt with a large grin on his face, “let's show them what we can do."

“Oh, fuck, I fucking love that smell..." said the rat.

“What smell?" asked the wolf, turning around toward Gregor.

“The musky smell of your seed, Leonhardt," replied the rat, licking one of the splatters of cum off of one of the lab coats, “and I love your taste, too. I want your fat cock in me again, big guy."

“You'll have plenty more later if you want, but for now we need to track the others down. Let's show them what we're made of."

“And let's shower them in our musky cum!"

“And then let's fuck them till they can't stand anymore!"

The two massive males exploded in an evil laughter, their cocks were already hardening again at the thought of corrupting the other guys. They began sprinting through the dimly lit corridors of the underground facility, following the fresh tracks of the humans' smell.

=== Heroism ===

The general, Dmitri and Isaac were running in the underground facility's corridors. They had gotten rid of their coats and jackets as those had been splashed with some of the monstrous wolf's cum. The two scientists were wearing t-shirts, and the general had a tank top that was tight on his large frame. They were running to the elevator, their only way to escape from this place. While the general and Isaac were healthy and maintaining a steady rhythm, Dmitri was struggling to follow them, huffing and panting loudly. They had to take a couple breaks because of how exhausted the expert chemist was, and the General used those to remind the other two to be as quiet as possible. The head of the military guided the two scientists through the facility, and many times during their flight they found - and avoided - hallways that were reverberating grunts and cries coming from other rooms. When finally they reached the elevator, the general pressed the button to call it, almost hammering it to try and make it come faster.

“What's happening?" asked Isaac.

“Quiet!" whispered the general with a sharp tone, “Don't talk too loudly, or they'll hear us."

“They who?" inquired Isaac.

“The monsters." replied the general in a low voice.

“How did that happen?"

“I don't know. There was an outbreak at the gym facility, and the men here began transforming into the same sort of beasts like Leonhardt. The man that reported to me through the telephone told me that the guys were starting to change when they came in contact with those things'... cum."

“That's disgusting!" said Isaac.

“Stop yelling," said the general, “you said there might be a cure, Isaac. I want us to escape from here, seal the place tightly and come back as soon as we have a countermeasure to this infection."

“That's... crazy. How did that happen in the first place?"

“This is some confidential information that I am not allowed to share, Isaac. I'm afraid you'll have to make do with what little I can tell you."

While the general and the young physicist were discussing, Dmitri was recovering from the running, hunched over with his hands on his knees and panting loudly. The elevator was slowly getting there, though no matter how much time it took, the chemist was unable to catch his breath.

“We will do it," said Dmitri, huffing loudly, “general. Even if it takes a lifetime.... we'll do it."

They then heard the sound that brought them hope, the elevator's doors opened. As soon as all three had stepped inside, the general quickly pressed the button of the topmost floor and finally allowed himself to relax for a few seconds. Dmitri was leaning back against the wall, slowly letting himself fall on his butt. Isaac stood in a corner of the elevator, trying to process what was happening in this facility. He was starting to regret accepting this job without trying to understand what was going to be researched here. They were at the lowermost floor at the moment and the facility was buried deep underground, which meant that it would take a long while for them to reach the surface of the earth. They were in for at least half an hour of elevator ride.

After a couple minutes in, Dmitri was still sitting on the ground, huffing even louder than before. The general was deep in thought, his arms were crossed and his finger was nervously tapping down against his arm. When Isaac looked at the chemist, he noticed something wasn't right.

“Dmitri, are you okay?" asked the physics prodigy.

“F-fine... I'm... just exhausted." replied Dmitri, who had a lot of trouble answering that simple question. “Today's been crazy... hasn't it?"

“It's beyond crazy at this point..." mumbled Isaac.

After another minute of silence, the General snapped from his thought and looked at Dmitri.

“F-fuck." groaned Dmitri, “Is it boiling hot here... or..."

“Dmitri," said the general “I'll ask you to tell us the truth. Did you ingest some of the monster's load before?"

“N-no! I didn't!"

“The soldier that reported to me about the situation at the gym described symptoms similar to yours after they were in contact with the substance for an extended period of time. If you are contaminated, we will need to part ways with you as soon as possible." said the general. The army solder brought his hand behind his back and pulled a handgun that he pointed towards the helpless scientist. “Don't lie, Dmitri."

“I... you... you wouldn't do that, general Admic..."

“I will do whatever it takes to get rid of this problem, Dmitri."

“P-please, general! I didn't ingest any of the substance!"

“Don't lie to me! You're already infected, it's too late for you." said the general, who began pulling on the trigger.

“General, please, don't do that!" intervened Isaac, putting himself between the other two men. “We... we can save him too. I just need time to find a cure."

“We don't have time." countered the general, “He's going to transform here if he stays here alive. And you've seen what happens when we try to restrain those beasts, they're way too strong to be contained."

“We can let him get out of the elevator!" cried Isaac.

A long silence weighed heavily as the three were in a standstill. Dmitri was begging for his life while Isaac and the general were looking at each other in the eye.

“You're too soft, Isaac," said the general, lowering his weapon and putting it away, “I hope we won't regret this later." he added, before pushing the button of the next floor in reach. They had climbed only four floors yet, and when the doors opened to an empty corridor, the army commandant growled at the chemist “you can thank Isaac for that, Dmitri."

“Y-yes! Thank you, general Admic! Thank you so much, Isaac, I'd be dead if it weren't for you!" said the scientist, trying to grab the young man's hands to shake it in gratitude.

“Don't you dare touch him!" yelled the general, which made the chemist leap back from fear. “You're infected and Isaac is our last hope to cure this plague. Get out of here NOW, before I change my mind and stick to my original plan of driving a bullet through your heart!"

The chemist stood up and quickly stepped outside of the elevator. He then turned back and looked at the two men in the elevator.

“Dmitri," said Isaac, trying to look hopeful, “we'll be back with the cure, I promise."

“If you want to make yourself useful," added the general, “try holding them back. We'll need as much time as possible."

And with these words, the doors of the elevator closed. Dmitri thought about what to do now, he was definitely trapped in here and there was very little that he could achieve. He however got an idea and ran towards the staircase, going a few level downs to the laboratory. The chemist knew he didn't have much time, he had to do something while he still could. In one of the laboratories, he had done several experimentations with the substances, trying to alter their compositions. He headed there while breathing heavily.

Upon entering the lab, which was completely deserted, Dmitri's nose was assaulted by the heavy scent of musk. Entire workstations were drenched in cum, shattered fragments of furniture were lying all around the place. The biologist quickly went to the freezer in which his altered samples were waiting. He scooped the half-dozen of vials in his hands and left in a hurry. While he had been running to his lab earlier, he had heard a lot of noise going on in the garden facility, which was not only a garden to harvest plants for scientific purposes, but also acted as a vegetable garden. This laboratory had such a facility because being trapped several hundred feet underground was sure to take a toll on the people's morale. There were several places where the scientists and soldiers could go to enjoy a break, like the garden or the gym. As soon as Dmitri opened the gates of the garden, the sight made him have second thoughts. Scientists and soldiers alike were running away from giant anthropomorphic beasts with huge muscles, gigantic balls and enormous cocks that easily reached up to their pectorals. Some other of those monstrous creatures were fucking or sucking each other, and a lot of them were firing cum all over the place. There were so many puddles of the sticky stuff lying around that it was difficult not to walk into one. Thankfully for him, all of those monstrous guys were busy with each other or with fleeing humans. Dmitri steeled himself and stepped forward proudly. He breathed deeply and brought the vials in front of his face.

“What a nice surprise, Dmitri, you've come all the way to us," said someone with a deep voice from behind Dmitri.

When the biologist turned towards the source of the voice, he saw a giant 7'6 rat monster. He stepped back and slipped on a puddle of cum, landing butt first on it with a splash. He stuttered “who-who-who are you?!"

“Dmitri son, don't tell me you've already forgotten about daddy Gregor."

“G-Gregor?! No way!"

“You know, when you and the other two cowards left me behind, I was extremely angry. But after experiencing the change, I can say that I love it and that I don't regret anything. And you know what? Daddy's gonna do the honour of making you my bitch, and you'll see just how incredible this all feels."

“I won't let you do that to me, Gregor! I'm not as weak-willed as you are, and I certainly won't yield to the likes of you!"

“My, my, aren't you the feisty one. And what do you plan to do here, surrounded by 'the likes of me', eh?"

Gregor stood up, wiped his cum covered hands on his shirt and showed the collection of vials in his hand to the rat. “These. These were the samples I was working on. I'm convinced that at least two of them can cancel the nefarious effects of the infection!"

“Those are..." replied the rat.

“They are what will allow me to undo you! And then, Isaac and the general Admic will be able to get away to create a cure to save us all from this evil!"

“I've got bad news for you, son. Leonhardt went after them, and I'm pretty sure he'll find them in no time to make them join us. Speaking of joining us, why don't you accept your fate and start worshipping daddy's needy dick?"

“I will never fall down so low as to do that!" said Dmitri, who uncorked one of the vials and brought it to his mouth to down it.

“I must say you have quite some balls, going willingly down like that!"

As soon as he had swallowed the content of the first vial, Dmitri began coughing. He wanted to throw up. But he had to do it. “I told you I'm not going down, Gregor. I'm going to... to get the body I need to... ugh... to fight you. There must be one of these alt-altered samples that wi- guh… will help me!" and with that, the scientist uncorked another vial and wrapped his lips around it before lifting it up. As the liquid fell down his throat, he felt his body pulse with heat.

“You don't look like you'd put much of a fight, Dmitri. I admire your righteousness, though, you've always been the kind of idiot that thinks everything we do must serve some kind of greater purpose or whatever bullshit you wanna call that."

The other few vials almost all fell off of the human's hands. He however uncorked two more and downed them in a few seconds. “Justice always..." said Dmitri, who was having more and more trouble focusing on his words, “prevails... Gregor. You won't... win... uurgh…"

“Doesn't look like you will win either!" said the rat before laughing loudly.

Gregor noticed behind him that one of the last few humans in the room was trying to sneak back behind him to go through the door from which Dmitri came. The giant rat leaped while turning and grabbed the human by the neck.

“Let me go!" cried the soldier.

“Let him go, Gregor! Let him go, or I'll make you let him go!" yelled Dmitri defiantly.

“Oh really, Dmitri? Then do it!" dared the rat, “Show daddy what you've got."

“You asked for it!" said the chemist, opening the last three vials and looking at them with disgust. He then muttered weakly “please. Oh, please, let there b-be one that'll… reverse the… infection!" and dumping their contents in his mouth all at the same time.

As soon as the biologist swallowed the mouthful of the substance, he let out and 'urk' and fell on his knees, holding his neck with both hands as he began huffing loudly. His cock, which had already been hard for a while, began shooting cum, drenching his underwear and trousers. His bones began crackling as his skull changed ever so slightly. Two protrusions formed next to his nose and grew downwards, his nose expanded into a cylindrical shape and started elongating, and his ears expanded while becoming flatter. The hair on his head slowly became browner, fluffier and longer, and began sprouting all over his face, neck and whole body. As he swelled and grew, he let out some guttural grunts while battling against the need to let the pleasure take over him. Pectorals, abdominals, shoulders, back, every single muscle on his body was expanding with more strength. His shaft and balls were growing at an alarming rate, bulging his pants with two spheres and a large tent. The wet spot at the front of his pants was expanding, the flow of pre was so strong that it went through the fabric and started dripping down the cloth. He was trying so hard to fight the infection, but his mind was slowly getting overwhelmed by the pleasure and the intense need to fuck. Clothes ripped around his frame and rags fell on the ground because they couldn't contain the growing muscles of the chemist. His underwear and trousers were pierced open by his elongating cock, which started spewing more and more pre as it continued swelling. His nose expanded longer by the second, his ears grew wider and longer, and from the protrusions on the sides of his nose, two ivory nubs began growing downwards. The wool-like fur was at this point covering his entire body. His shoes exploded, releasing his growing feet which were slowly transforming into powerful cylindrical feet with three strong nails at the front.

The rat was looking at the show of his ex-colleague transforming into a beefy mammoth, while idly stroking his dick. He suddenly got a wicked idea and held the terrified soldier right in front of Dmitri.

“Hey, Dmitri, I have an idea to make this more interesting." said the rat to the transforming chemist, “I won't 'infect' this guy. You, however, you will infect him."

“I... guuuh... I won't... yield..." gurgled Dmitri. The arousal was so overwhelming that it was preventing him from talking coherently.

“We'll see about that, Dmitri. Daddy knows you won't resist." taunted the rat, putting the soldier right in front of the transforming man. “Look at him, Dmitri. Look at that innocent, disgusting human face. And yet, that ugly face holds so much potential, think about how big he'd get, how strong he'd become, how handsome and sexy and virile he'll be when he's like us."

Dmitri was having trouble staying sane, he closed his eyes and grit his teeth. He had to hold those beasts back to give Isaac and the general enough time to flee, but he wanted to let go and give in to this desire. His trunk was elongating even more and his tusks were growing longer and curving upwards. A small tail started sprouting out of his lower back and became longer while covering in a fur that was thicker than the rest of his body. His forehead grew a bit longer in height and his shoulders bulged with incredibly powerful muscles. The torn pieces of clothes that were covering his body were slowly ripped apart and falling, leaving him completely naked. He could feel his orgasm incoming, but he had to hold it in; he was sent here to delay these monsters, not help them infect others. He was deserately struggling, not wanting to infect the soldier that Gregor was offering him.

“Dmitri, just listen to your inner desire," teased the rat, “you want this, don't you? You want to make that puny human into something greater, a huge beefy anthropomorphic animal. What do you think he'd become? I'd like to see a stag, or a lion, or maybe a shark! Oh, wait! What if he became like you, a prehistoric animal, a megalodon!"

All those words were echoing in Dmitri's mind and he was desperately trying to silence them. He brought his hands to his head and began moaning, half from frustration and half from pleasure. The larger his body became, the harder it was to resist the temptation.

“Just look at this guy, Dmitri!" yelled the rat. As soon as the transforming chemist opened his eyes, the rodent resumed, “good. Now, look at yourself, Dmitri..."

It was so hard to focus on anything for the chemist, but he managed to do it. He looked down at himself and loved what he saw. He had become a nine and a half foot mammoth with extremely large muscles all over his frame. His back, biceps and shoulders were the most developed of his muscles. His new trunk felt weird to move around, especially with his gigantic curved tusks, and he felt a compelling need to send this new appendage of his to touch his cock. Because he was still kneeling on the ground, although with his legs much more spread out because of how gigantic his package now was, his two foot wide balls were firmly resting against the ground while audibly sloshing with cum. His five foot shaft was so heavy that it was partially resting against his ballsack, and curving down towards the ground, with its tip was just grazing against the grass of the garden facility.

“See?" whispered the rat while licking his lips, “This is much better than before, Dmitri, isn't that right?" After seeing the chemist nod weakly, he added “now look at this guy. Don't you want to share this gift with him? Don't you want to see him become like us?"

“Please!" pleaded the soldier, “Don't give in, help me out of here!"

As soon as the chemist's gaze fell upon the helpless and begging human, he felt his cock throb powerfully. His shaft was shooting small jets of pre, which thankfully for him, didn't reach the terrified soldier. “N-no... I d-don't want... ghhh..."

“Stop lying to yourself, Dmitri. Just look at him. And just picture him as a shark with huge muscles, with a finned tail, with powerful webbed feet and hands, and with the two cocks that the great whites usually have. Just picture it. How big would they be, up to his nipples? Up to his chin? Or just like yours, even bigger? What if they reached well over his head?!"

The pictures were swarming Dmitri's mind. And he gave in, he wanted to see it. His cock began blasting cum all over the soldier, who cried in despair. Wave after wave of mammoth seed showered the poor human under the delighted eyes of the rodent. For the next few minutes, shot after shot flew out of Gregor's cock, and the newly transformed chemist was in complete bliss.

When finally his orgasm weakened, the rat let go of the soldier, who fell on the puddle of mammoth cum and began shivering as his body started transforming. Gregor turned his back to Dmitri, got on all fours and lifted his tail high. The woolly pachyderm immediately got closer to the rodent and shoved half of his cock in one thrust in the rat's asshole. Because of the sheer difference in size between the two, Gregor's belly was protruding forward with an immense bulge made by the giant mammoth cock. The two began fucking doggiestyle like wild beasts, letting out grunts and manly moans as they were nearing their orgasms.

When Dmitri finally was finally able to get most of his shaft into the rat's hole, each of them noticed a massive cock pointing at their mouth. The two looked up to see a nine foot tall megalodon kneeling in front of them, holding each of his two tapered dicks in front of the mammoth's and the rat's head.

“If you guys were hoping for a lame shark, I'm sorry to disappoint. Don't mind me being a megalodon instead! Now, be good boys and get to work, daddy's thick shafts need to be sucked; there's even one for each of you two sexy beasts!"

The rat and mammoth quickly got to work, they both opened their mouths and each of them took one of the seamonster's shafts. Dmitri wrapped his trunk around the presented shaft to angle it into his mouth. He worked on the giant cock by both deepthroating it and stroking it with his trunk. All three of them were losing themselves in lust and they came at the same time, unleashing a flood of cum everywhere. The flows of seed into the rat's holes were so intense that his belly filled up like a water balloon thanks to how potent the balls of the two enormous prehistoric men were. The rodent's load was splashing all over the ground below, adding to the already immense puddle of cum lying there. Both of the megalodon's shafts were firing an impressive amount of seed that both the two others eagerly drank. All three of them were completely lost in bliss, completely forgetting about the terror they felt as humans at the idea of becoming hulking monsters like the one they were now. There was only one thing they wanted now, it was to enjoy their new bodies.

=== Flight ===

“General Admic," began Isaac.

“You can drop the formalities, Isaac." replied the army captain, “There's no point to those titles anymore. Just call me Derek."

“Whatever. What's with all of this?"

“I'm afraid I can't share that –“

“I don't care whether you can or can't." yelled the young scientist. “This is an emergency, general! We're in the middle of some sort of outbreak where guys transform into huge animals with enormous penises and you tasked me to solve the problem. I am in the right to know what it's all about, now!"

There was a long silence where Isaac stared at the general, whose face was as stern as ever.

“Very well. What is it you want to know, Isaac?"

“Everything. Just tell me everything. Any bit of information that could help me understand what this plague really is."

“This is no plague. This is the unfortunate normal effect of the substance you scientists were working on."

“You're calling THIS normal? This is beyond fucked up! What kind of madman are you? Just what is that substance exactly?"

“It's the semen of an alien species of overmuscular and overvirile males."

“Wh-what?"

“We do not know why it makes people transform. But we know it does. When we were sent to retrieve the alien in his crashed shipwreck, he was covered in that substance. Almost all the guys who went there were contaminated, and to prevent an outbreak, I had to... to end them."

“End them? What do you mean"

“It was twenty five years ago. My squad was sent to retrieve the alien and the samples. The general at the time, my mentor, was the first infected. We watched in disbelief as he became like one of these guys, an anthropomorphic hyena. There was a bit of an incident and he sprayed semen everywhere, infecting several other people of my squad. The few of us that were untouched decided to kill the ones that were at risk of being infected and thus, transforming. After that incident, we started using the hazmat suits to protect ourselves from the substances, and it seemed to be working quite well."

“But if that thing was so dangerous, why are you guys trying to research it in a secret lab? That's just asking for an outbreak!"

“We have a backup plan. We will bury the facility by exploding it as soon as the two of us are safe."

“What about the guys that were transformed? You just said to Dmitri that we'd come back and save them!"

The general lowered his head, closed his eyes and brought his fist against his chest. He then whispered “may their souls rest in peace."

“That's insane! Why are you guys even trying to do something like this!" yelled the young scientist.

“An underground organisation controlled by a part of the government wanted this. They wanted to find ways to tone the transformation down, and take only the heightening of muscle mass and improvement to senses like vision or hearing without the libido and wicked personality."

“That's nuts! Just because you guys wanted to make super soldiers or whatever doesn't make it right to do something like this!"

“Isaac. I understand what you mean, but I had no choice in the matter. After the incident at the crash site, there were five survivors. Two of them took their lives in the next few days after it all happened. There was one of my colleagues who was in critical condition after the battle with the monsters, he died of his injuries a month after the incident. The remaining two of us that survived went through years of therapy before we were finally able to live with the trauma. Soon after he was discharged from the psychiatric hospital, the other survivor and his wife mysteriously vanished from the surface of Earth one day when they were on vacation on the other side of the planet. As soon as I left the hospital three months later, I was blackmailed and threatened. If I didn't accept to work with them, they were going to kill me and my family and make it look like an incident. I think you know very well what they wanted me to do, it is exactly the reason why we were in this underground laboratory."

“Derek... you're..."

“Isaac, I've been shackled by these lies for more than twenty years. You, however, you are our future." said the general, who took both of Isaac's shoulders in his broad hands. “I seriously don't think that blowing up the whole lab will save us from a nation-wide pandemic, so you'll have to work very fast. If it comes to it, I'll make sure there's a way for you to escape. I don't mind paying the ultimate price to atone for my sins, if it allows you to escape and find a cure for this plague. I'm counting on you, Isaac, you are our last hope."

“I'm... this is a lot of responsibility, and I'm not sure I can..."

“You'll have to try. I have faith in you, my boy." said Derek, putting his broad hand over the scientist's shoulder.

“Your smile is scary, Derek." said Isaac, trying to lighten up the gloomy mood.

At that moment, the power went out and the elevator stopped moving. The emergency power generator booted up and small red lights lit up the elevator.

“FUCK!" yelled the general. “We can't get caught now, if we are, it's all over!"

The general frantically pushed the open button of the elevator, then cursed some more. He opened the emergency panel, turned a handle and headed towards the door of the elevator. He put his hands between the doors and pushed outwards to open it. The two survivors were stuck between two floors, but there was enough room for the two to go to the uppermost floor. The general passed through and then offered his hand to Isaac, lifting him out of the elevator. The whole corridors were dimly lit as the power was out and the only lights that were working were emergency red ones.

“What should we do?" asked Isaac, panicked.

“There's an elevator that works on the emergency power generator," replied the army commander, “we need to get there now! Come on!"

The two began running through the halls. Thankfully for them, the emergency elevator wasn't that far. Unfortunately, there were so many of the monstrous creatures everywhere that it was difficult to find their way there. While running, they found two elite soldiers who managed to escape the beasts for now. They joined forces and quickly reached the emergency elevator and immediately afterwards, the general began the procedure to call it.

“Whose smell are those from," sang a deep voice, “I really do wonder..."

The voice was getting closer and closer and all four of the humans were getting on edge. The general was finally able to call the elevator.

“We need to protect Isaac. Isaac, take this key, you'll understand its purpose when you get on the surface." said the general, handing a box to Isaac.

“Oh, I remember, it's yours!" sang the deep voice again. “I know you two are there."

A huge wolf appeared at the end of the corridor. His face was contorted with a wide grin, and he slowly turned his head towards the four humans. “I finally found you, I've looked for you everywhere!" sang Leonhardt.

He stepped closer and closer “Can't find something that rhymes," he resumed with his deep voice, “but who actually cares..."

As soon as Derek brought his hand to his back to draw his gun, the wolf leaped forward, smacked the two elite soldiers, stole the pistol and crushed it all in an instant. The elevator wasn't there yet and none of them had any ways to defend themselves against that monster, they were in a dire situation. The two soldiers from earlier rose on their feet and lunged at the wolf with knives drawn out. Leonhardt dodged the blades, disarmed the two guys and grabbed them both to shove them on either side of his leaking cock. The two humans were struggling as they were slowly getting coated with a mixture of pre that shot from the cock and cum that covered the wolf's shaft. While he was toying with both of these guys, the doors to the spacious elevator opened. Both Isaac and the general went in without making a sound, and the general pushed the button to make the doors close. Right as the doors were about to be sealed closed, a gray-furred hand slipped between, making the two automatic door pans open again.

“Mind if daddy catches a ride with you?" asked the wolf. Without even waiting for an answer, he stepped inside “pardon me for intruding..."

“You are not welcome here, Leonhardt! Get out of here!" ordered the general. Seeing the absence of reaction from the wolf, he grabbed Isaac's arm, making sure to stand between him and the wolf should the monster leap at them, and began walking out of the elevator.

“You're already leaving?" asked the wolf, “I wouldn't do that if I were you, there was an army of guys like me that were right behind me."

The general stopped in his tracks and saw a giant alligator through the closing doors of the elevator, and saw the two elite soldiers begin to transform, one into a huge lion, and the other into a massive raccoon. There was no escape from this. The two humans stayed in the elevator, despite the giant wolf standing in there. Thankfully for all of them, this elevator was much bigger than the other one, it even allowed Leonhardt to stand upright without having his ears brush against the ceiling.

“Tell me," teased the wolf, “general, what's the plan now?"

“Escape from there," replied Derek, “have Isaac find a cure, and save all of you from this infection."

“That's quite the ambitious plan you have here. Have you even considered that we might not want to turn back to human?"

“That is none of my concern." said Derek in a sharp tone. He spoke to the young scientist, “Isaac, stay away from him."

“You should calm down, general." sighed Leonhardt, shaking his head, “I'm not gonna do anything to Isaac."

“I don't care about any of what you say, Leonhardt, I'll kill you if you dare touch even one of Isaac's hair!"

“You're so cute when you're angry, general. But as I said, I'm not going to do anything to Isaac, I don't care about him. However, I wonder what you'll do to him."

“What do you mean?"

“I mean that," said the wolf, squeezing his cock from the base to the tip, making it spew pre. He gathered the residual cum that was covering his shaft, along with the pre that had pearled at the tip and brought them close to the general.

“Don't you dare do that!" threatened the general, stepping backwards.

“What do you mean? You've asked me not to touch Isaac, but you didn't say anything about yourself. I'll give you a choice, general. Either I share this" said the wolf, raising his cum covered hands in front of Derek's face, “with you, or with Isaac. It's your choice. And I'm sure you've seen what I'm capable of, you don't even stand a chance if you were to fight me."

The smell of the cum was so strong that the general's mind was getting hazier by the second. He had however already made his choice and he was ready to follow through.

“I accept, but on the condition that you won't touch Isaac, then."

“You're annoying. Fine, I promise. Now that that's out of the way, have some of daddy's cum!" said the wolf, shoving the coated palms of his hands against the general's face.

Derek raised his hands to wipe the stuff away from his face, but Leonhardt countered any attempt by securing his hand on the general's face. The wolf even scooped some of the semen on two fingers that he then shoved down the human's throat. The general coughed and gagged as he tried hard not to swallow the liquid, but the wolf's fingers were so deep in his mouth that he couldn't do anything about it. After the wolf pulled his fingers out, the grizzled man fell on his knees, holding his neck in both his hands. He knew it was too late for him now, but he had to make sure that Isaac wouldn't get infected. Leonhardt went to the other side of the elevator, next to the corner where Isaac was cowering in, and sat while idly stroking his cock.

“You should watch the transformation, Isaac, it's super hot." said the wolf to the young scientist, “Especially when the man's big fat meaty cock bursts out of their pants; it's the best part. Always gets to me. I can't wait to see the result, what about you?"

Isaac watched in terror as the general's body started swelling. Derek's tank top was already tight on his muscular frame, but now it was strained with the expanding muscles underneath. The greying hair of the large man was becoming whiter and whiter on his head, his moustache and beard were whitening and growing longer and fur began covering the rest of his head. His ears were moving up his head, elongating and flopping down against the sides of his face. The raging erection in his pants was bulging his pants more by the second, and his balls made two more protrusions in the fabric of his underwear and trousers. The lower half portion of his face began growing forward into a snout, while his nose flattened and became progressively darker in colour. The upper part of his body was slowly getting covered by white fur while the lower part of his body was sprouting gray fur. His military boots creaked before their front side burst, revealing four large clawed toes. His tank top tore in multiple places, revealing patches of growing white fur. His camo trousers were shredded around his expanding leg muscles, freeing his calves and thighs from their tight cloth prison. A loud ripping sound was heard, and immediately afterwards, a gray tail with white tip began showing and wagging. The belt around his waist snapped, the button of his trouser flew off and his zipper opened, revealing a cock that was already canine in shape and that was pulsing, growing bigger, longer and girthier with every throb.

“That's... unf..." said the wolf while fapping, “that's the stuff! Oh my fucking god, look at that shaft!" he added before opening his mouth wide to take the tip of his cock inside his maw, and resumed jacking off.

The general fell on all fours, panting and huffing loudly. His tongue was flattening and elongating more with each second, making it hang further down with every time he exhaled. His teeth were growing wider at the base and more pointed at the tip, changing in shape to become sharp fangs. He held back any desire he felt despite the intense stimulation of the transformation, his discipline was helping him greatly in resisting the temptation. His fur grew fluffier and longer, especially his eyebrows, beard and moustache. He felt a particular strong pulse of pleasure go through his body, making him swell half a foot bigger. His shaft went through the same change, and started leaking pre in a steady flow that dripped on the metallic ground of the elevator.

“F-fuck!" yelled the Old English sheepdog before falling on all fours, his hands splashing in the puddle of pre that his dick was leaking.

With every throb of his shaft, it grew bigger and heavier, leaning down towards the large puddle of pre. Every breath the sheepdog took made him gain muscle, height and breadth. He was huffing louder and louder with every minute that passed as the arousal in him rose to higher levels. His biceps and traps bulged with power, his pectorals expanded without limit and a bit of fat started covering his immense ten-pack. His balls dropped lower, gradually falling right in the puddle of pre while sloshing audibly. His cock surged an inch in length with each of its throbs and soon became large and heavy enough to reach down in the puddle of pre too. The general was looking down at his own expanding shaft, the view was so extremely exciting to him and yet, he had to resist the urge to touch the thing. He was already reaching up to ten feet in height with a three foot shaft, and he was still growing at a fast rate.

Leonhardt stopped suckling on his own cock to say “holy fuck, the general is getting even bigger than the biggest guy I've seen yet! More, general Admic, grow more! Show us your potential!"

“F-fuck off, Leonhardt..." grunted the Old English sheepdog.

And Derek grew more and more. His muscles swelled, his broad shoulders became even broader, his cock elongated and widened further, and his balls expanded more. He was standing his ground exceptionally well, considering how horny he felt. He reached to eleven feet tall, and yet his transformation still went on. His nipples expanded in width, his tail grew longer and his fur became a bit fluffier. The pleasure was so intense that he didn't know himself how it was possible for him to hold out. He swelled even more, soon growing past twelve feet tall with a cock that was lengthening, reaching well past his head at this point. All of his upper body was bulging with power and strength, growing ever bigger with every second. His balls were soon getting large enough to completely fill the space between his legs, and they were sloshing with so much cum that he thought they were going to explode. The flow of pre out of his shaft increased yet again as the Old English sheepdog grew to thirteen feet tall. The puddle of liquid was almost covering the entire floor of the elevator, Isaac would have soon nowhere to go. The increase in potency of his balls, the heavy musk, the sight of his own cock growing even bigger, it was so hard to resist giving in. However, as soon as he grew to fourteen feet tall, he felt his body relax. It was finally over. His shaft was eight feet long and three wide, his knot was about one and half times the size of his waist and the huge ball of flesh was so big that it reached almost up to his nipples. He breathed heavily while looking at the pulsing meat underneath him. It was so massive that he could have hugged it. That thought made him shoot a large glob of pre that almost flew all the way to whereIsaac stood.

“Holy fucking shit, general Admic!" said Leonhardt after letting go of his shaft and licking his lips clean of pre, “you're looking fucking amazing! But anyways, as promised, I won't touch Isaac. I mean, look at him, he's completely terrorized."

The general looked up and saw the young scientist. The human was wide eyed and mouth agape from the terror, cowering in a corner. “Is-Isaac son... I'm... I'm sorry you had to s-see d-daddy like that. I promise that daddy... that I'll protect you." his mind was getting hazier by the second and he caught himself having dirty thoughts.

“Aww look at that, general, you're terrorizing him." teased the giant wolf. Leonhardt put his arm over Isaac's shoulder and grabbed the human's chin in his free hand. He ran his thumb close to the young scientist's mouth. “Would you look at that mouth, I wonder how much of our fat cocks it could handle..."

“Get your hands off of MY Isaac!" snarled the general. “He's MINE and MINE ALONE!" he yelled at the wolf.

The thought of someone else claiming his boy made the general's blood boil. Images of him toying with the human danced in his mind, and those aroused him so much that his cock shot an enormous rope of pre that splashed all over Isaac. Because the wolf was holding the scientist's mouth open, Isaac got some in his mouth. As soon as the general heard the human coughing, he came back from his craze and realized what he had just done.

“See, Derek?" said the wolf, letting go of Isaac, “I didn't do anything to him, just as I promised."

“Isaac?" cried the general, “Isaac! No, Isaac!"

=== Despair ===

“Come on, Isaac, fight it!" said Derek, “Please! Fight it! We need you to find a cure, Isaac!"

“It's useless, Derek!" sneered Leonhardt. “It's already too late!"

Isaac was holding his head in his hands. Derek got on his feet, hunching slightly so he could walk, and approached the human.

“No!" yelled the young scientist, “Get away from me, you monster!"

Derek took a few steps back and let himself fall on the floor butt first. “Isaac, you need to fight it! Please, I beg of you!"

“It's all your fault!" yelled the human, who was already changing. Short and thick fur started growing all over his face. He looked down and began crying “It's over... all hope is lost..."

“No! Isaac, it's not over yet, look at me, I'm still sane, you can do it too!"

“But I'm not as strong as you, Derek. I'm nowhere near as strong as you..."

“I beg of you, Isaac, please, fight it... Don't lose hope, you're our last chance to go back to normal..."

Isaac fell on his knees and moaned as he reached his orgasm. His cock wasn't even fully hard, and yet it was still firing so much cum that his underwear was quickly drenched. Unlike the other guys before, the young physicist didn't have the will to resist, he just gave in and accepted his fate. Two nubs of keratin formed at the top of his head and his whole body covered in the same dark brown fur as his face. His ears elongated and flopped down, taking on a bovine shape. His nose flattened, the lower half of his face changed into a snout that elongated quickly, and his nostrils moved closer to the sides of his new snout. Two cloven toes pierced the front of his shoes, and two more pierced the soles of his shoes. The back of his pants creaked open as a tail began growing there.

“Isaac! Please, resist!" pleaded the old English sheepdog.

“Don't listen to him, Isaac," said the wolf calmly, “just give in to the pleasure."

The young scientist moaned loudly. The pleasure was completely overwhelming him and there was no way he'd try to resist it. His balls burst out of his trousers, and his growing cock followed shortly after. Cum was shooting everywhere in front of him, and the large wolf immediately knelt down to lap at the splatters of seed. Isaac brought his hand around his growing shaft and began stroking it, feeling the powerful throbs that made it expand in length and girth. His keratin nubs on the top of his head quickly grew larger, going towards the sides of his head and following his skull until they were right above his ears. These large growing horns then extended away from his head and elongated outwards while curving upwards ever so slightly. The previously nonexistent muscles of the scientist quickly began growing bigger and stronger with every second. His tail lengthened, his cloven hooves outgrew his shoes and his nose elongated further. Every one of his shots of cum landed further than the previous and coated more of the floor, until the shots landed on top of Derek's groin, then abs, pecs and finally face. The young scientist grew past seven feet tall in no time, and packed on more muscles with every second that passed. His cock was already reaching to two foot long and was still swelling with more length and girth. Isaac was forced to bring his other hand to work on his shaft to be able to stimulate properly because of how large it was becoming. His balls dropped lower and lower while expanding and growing further, producing an ever-increasing amount of cum. His pectorals swelled, his nipples expanded, his abdominals became an immense ten-pack, his back and shoulders beefed up. All of his body was growing bigger and stronger while he was completely losing himself in the intense pleasure of his ongoing orgasm. His calves expanded and packed on more strength, his thighs exploded in size, his glutes considerably grew, and his back and traps gained an incredible amount of volume. He soon reached to eight feet tall, and his cock was well over three feet now, still firing an immense and neverending load of cum all over the sheepdog. Derek felt half proud and half sad of seeing Isaac like this. Pride because of how sexy his boy was becoming, but sadness because he was the one responsible for the fall of the one he called his 'last hope'.

When finally the buffalo's orgasm weakened, he stood at 8'6 and sported a 4' long and 1'6 wide cock that was still weakly spewing cum. His enormous balls were two feet wide each and were sloshing with even more seed, preparing another release. He was a god of muscles and virility, and he absolutely loved the result. And above all else, he wanted more.

“Hey, Derek." he said with a deep masculine voice.

“What is it, son?" replied the Old English sheepdog.

“Why'd you want to not share this with me?"

“Because daddy thought you'd hate it, boy."

“Well, I fucking love it."

Derek let himself fall backwards on the ground and landed with a loud splash, making the mix of seed and pre splatter around. He then sprawled himself out, pushed his cock aside and looked at the ceiling with melancholy. He didn't truly know the danger of what he had unleashed upon Earth, but he knew it might have spelled doom for humanity. He felt two hands lift his balls, push them upwards and then felt two hands grab his lower back to slightly lift it up. A gigantic cock prodded against his asshole, and he felt a mix of apprehension and ecstasy at the thought of being penetrated by such a large tool.

“Hope you won't mind, 'daddy'." said the buffalo.

“Go ahead, son," replied the sheepdog, “show me what you've got."

A whole foot of shaft was instantly buried deep in Derek's ass, stretching his hole and flattening his prostate. The invasion felt weird, yet highly pleasurable in his virgin ass. There was no point for him to hold back on this craving any longer. He slowly gave in to the pleasure, hope was lost anyways, he figured he might as well enjoy it.

“F-fuck, you're tight, I'm gonna tear your ass apart!" said the young scientist.

“Don't get too cocky, boy," replied Derek, “daddy can handle cocks much bigger and fatter than yours!"

Isaac took that as a challenge, he shoved another foot of his girthy tool in the gray and white dog's ass. He then began pulling out and ramming it at a steady rhythm. He even leaned forward so his snout was right in front of the sheepdog's enormous knot.

“Y-your musk is... so intoxicating!" said the buffalo before opening his maw wide to start lapping at the giant ball of flesh.

“Hey!" pouted the wolf, “haven't you two forgotten about someone!?"

“Just shut up and come get some, Leonhardt," replied the military commander, “Daddy can handle both of you at the same time just fine!"

The large wolf hopped on his feet and leaped towards the head of the sheepdog. He aimed his massive dick down towards the giant dog and instantly felt a tongue run all over the tip of his shaft. The general began ravenously lapping on that cockhead, he drank every drop of pre that formed at the slit of the lupine dick and once in a while sealed his lips around the tip to suckle on it. Now that he didn't need to hold back anymore, he could finally enjoy all of this, the heavy musk of the knotted cock, the giant shaft in his ass, the incredible taste of the pre and the immense pleasure going through his mind. Humanity didn't need to be saved from these 'monsters', humanity needed someone to show them how great it felt to become a hung and muscular beast. He redoubled his efforts in working on Leonhardt's shaft with his mouth by adding his hands to help.

Leonhardt was huffing and grunting louder and louder, Derek was really making good work on his shaft. He pulled back, leaving the general frowning, took a few steps back and then knelt in front of the sheepdog's head. He brought his shaft again towards the larger man's muzzle and edged closer to him. The general gladly opened his mouth and took the cock inside him. The large wolf slowly began getting even closer to the other canine stud, forcing inch after inch of his shaft to slide inside the sheepdog's mouth. He put his hands around the large male's head to feel the insertion from up close. Every inch added made the sheepdog's mouth bulge with the enormous shaft. His maw was spread open wider and wider, his cheeks were getting fuller and his throat started stretching outwards to welcome the intruding cock. Inches soon became feet, as the wolf was forcing his meaty spire further down the dog's throat. As soon as his enormous knot met the sheepdog's lips, he stopped pushing. He began pulling out before ramming it all inside again.

Without stopping to fuck the larger male, Isaac brought both his arms to encircle the sheepdog's balls and began massaging them as best as he could. He could feel and hear those massive four foot wide nuts slosh loudly with just how much cum they held. It was making him go wild, he wanted to behold the sheer output that they could unleash. He nuzzled against the left one and took a few deep whiffs of their manly musk before letting go of it and turn towards the second one. He then encircled one ball with each arm, leaned until his nose was touching the gigantic canine knot and began licking it. At first it was just shy licks, but it soon became more, he laid his tongue on one side of the massive ball of flesh and ran it all the way around to the other side. He went up and down, left and right, in circles, feeling the powerful throbs of that immense shaft under his tongue. He suddenly realized that he had stopped humping into the dog's ass, and thus immediately went back to it, thrusting a couple feet of his own fleshy spire at a time, without forgetting about worshipping the giant nuts and enormous knot.

The intense pleasure Derek felt from being penetrated from both sides was incredible. He didn't regret even one second what had happened in the lab, and he was glad that their attempts to flee failed, because he could now enjoy this extreme pleasure. His shaft, which was resting against the left part of his chest, began spewing massive globs of pre. Every time it throbbed, there was a gallon of the transparent liquid that dripped and fell on the ground. He used his whole arm to encircle it and began rubbing all over it. He brought his other hand to caress at the huge lupine knot that was teasing his mouth, making Leonhardt grunt and moan at the touch.

Leonhardt's gaze fell upon the sheepdog's shaft, and it made his mouth water at the sight. He brought his hands to that giant tool and lifted it up towards his own muzzle. With one of the powerful throbs of the enormous cock, a huge glob of pre was fired over the wolf; it fell on his chest, gut and knot, coating all of them with the liquid. The wolf immediately wrapped his lips around the tip of the shaft and began suckling on it, attempting to drink the gallons of pre that were shot with each of the throbs. He suddenly felt two hands grab the base of his knot and pull on it, so he stepped ever closer to the gray and white dog, simultaneously diving deeper on the dog's cock and pushing his massive ball of flesh against the sheepdog's mouth. As his large knot began sliding inside the general's throat, Leonhardt was getting close to orgasm.

Isaac let go of the sheepdog's balls, pushed them apart and leaned between them to focus all of his attention into working on the army commander's huge knot. He ran his tongue and both his hands all over the massive ball of flesh, caressing, licking, rubbing, nibbling, he did everything he could to stimulate that giant knot. He eventually lost himself and began humping into the sheepdog's tailhole even faster than before, pulling out and shoving three feet of his shaft with each thrust. He opened his arms wide and tried encircling the gigantic knot in his embrace, and began kissing it, lapping it, rubbing it with his nose and eventually his whole face. He too was getting close to the peak of pleasure.

Derek was in complete bliss. As soon as the lupine knot was completely inside his mouth, he let go of Leonhardt to grab his own shaft and work on it. He rubbed his hands, arms and even his gut against it to try to stimulate it even further. With a giant knotted cock in his mouth, another giant shaft in his ass flattening his prostate, a buffalo hugging his own giant knot, a wolf drinking pre from his tip and with three pairs of hands thoroughly rubbing his shaft, he was brought to orgasm. His urethra bulged with an enormous amount of cum, making it look like his whole shaft was widening. The first blast was so powerful that Leonhardt's head was slightly forced back. The first blast was so powerful that Leonhardt's head was pushed back a bit, and the amount of cum shot was so plentiful that his belly began expanding fast. As the second load began, the wolf was forced away so much that the tip of the cock wasn't lodged deeply in his oesophagus anymore. The immense amount of seed shot made the wolf's cheeks bulge because the output was just too great for him to swallow, and most of the cum escaped from his mouth, splattering all over their fur. With a third powerful shot of cum, Leonhardt was shoved away from the shaft. Finally freed, the gigantic cock began hosing cum all over the wolf's face, pushing him back further. Because the wolf was deeply tied in Derek's mouth and because he was clinging on to the giant shaft, he was forced to endure blast after blast of canine seed all over his face. His own cock began unleashing the contents of his balls, sending waves of cum in the depths of Derek's stomach. The two cocks on either end of Derek were spewing gallons of seed a second and even with the difference in size between him and the smaller guys, his belly began expanding fast. The sight of the ex-military commander's first shot brought Isaac to orgasm too, his dick erupted with torrents of seed that mixed with the wolf's directly in the dog's belly. Waves after waves of cum were fired from their three cocks, and all three of the giant males were in complete bliss. The sticky white fluid flowed everywhere, filling Derek's belly, backflowing through the small gap in his mouth, through his nose, and through his asshole. His own shaft was pumping hundreds of gallons of the sticky white fluid against the wall behind Leonhardt. The output of cum being fired from either of their three dicks was so gigantic that there was soon an inch of it all over the elevator's floor. The smell of cum and musk was getting incredibly strong, which helped them keep their orgasm going strong.

Something snapped in Derek's mind, he completely gave up on his humanity. He wanted to make other guys like him, he needed to transform other guys, and he wanted to take their fat cocks in his ass or mouth. There was nothing else that mattered, he just wanted other guys like himself to fuck or to get fucked by.

When the wolf and the buffalo had reached the end of their orgasm, the sheepdog's belly was well inflated, enough so that his shaft was almost aiming at the ceiling. Derek's cock was still going strong and fired wave after wave of seed all over the place. Both Leonhardt and Isaac slowly pulled their shafts out of the giant male's holes and began bathing in the half foot pool of seed, lapping at it and drinking it. Leonhardt dared having a few mouthfuls directly from the tap, though his swallowing speed was no match for the immense output of the sheepdog. Isaac joined the wolf and tried to get some of the shots by wrapping his mouth around the tip of Derek's shaft. Both the smaller males took turns in trying to drink the shots; but the blasts were so powerful only a small portion of them were shot down the smaller males' throat before the sheer force of the blasts forced them off of the giant cock. Because of how much seed slid into their bellies, both the buffalo and the wolf looked like they were pregnant. Even so, that didn't stop them from trying to drink every single drop.

When Derek's orgasm finally weakened, the elevator was a pool with a foot of seed everywhere. The giant sheepdog flipped and landed on his side and was looking intently at the door while stroking his still-hard shaft. The timing, to say the least, was very convenient.

=== Horizons ===

“Have you tried contacting them with the radios?" asked a soldier.

“I did, but I got no answer. Power shouldn't be going out down there." replied another.

“They still have the emergency power generator, and I've been told that there are lots of highly capable engineers down there." added a third.

The three soldiers continued talking to each other for a little while, wondering what they could do to know what the situation at the lab was.

“Guys!" said a fourth soldier, running towards the trio “The emergency elevator is coming up, something bad might have happened, get ready for any situation!"

All four of the soldiers joined the crowd that was waiting in front of the emergency elevator's exit. There were whispers and worried looks among the soldiers as they waited for the doors to open. As soon as the two door pans split, sticky white fluid began cascading and the stench of cum and heavy musk radiated out of the elevator. Many of the soldiers instantly fell on their knees as soon as their noses were assaulted by the smell. The few that were able to stand their grounds saw three massive beasts appear between the door pans. An eight foot tall wolf, an eight and a half foot tall buffalo and a fourteen foot tall giant sheepdog, all of which had giant cocks. The sheepdog's one was aimed at them and was firing cum, showering every single soldier with the sticky fluid.

“That's it, boys! Give in to the pleasure! Daddy wants you all to become as gifted as Leonhardt and Isaac, and he wants all of your fat dicks!"

All of the soldiers began transforming into huge horny beasts whose sole purpose was to fuck. Felines, canines, rodents, avians, reptiles, dragons and many other species rose from the crowd of writhing humans. In less than an hour, a horde of anthropomorphic beasts had risen and there was no humanity left. Most of them were fucking or sucking each other and cumming everywhere. But a few of those beasts left the shed that hid the entrance to this underground lab and set off to share the gift of their transformation. One of them went to a nearby high school, another set off to a sports complex, and a last one left to go to an aquatic park.