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Sam pushed open the door, stepping into his pitch-black lab. It was well passed midnight, and the facility was nearly empty save for a few patrolling armed guards, be still he glanced around all the corners of the room before stepping in. He wasn’t alone in here of course, but the other occupant was an expected sight.

“Hello, Sam.”

The voice spoke in a low growl -a woman’s voice but inhumanly deep and bassy, the words vibrating powerfully through his body as they issued from a speaker in the corner. Across the room, contained behind walls of several foot thick tempered glass, an enormous, black furred musclebound shape loomed, the floor of its holding pen covered in the blood of whatever unfortunate animal had been thrown in to feed her this night. More than twice as tall as Sam and perhaps four times as wide, she was a behemoth of lupine power, sporting biceps and thighs likely thicker than he was tall, a midsection sporting eight well defined abs and breasts larger than her wolfish head. The werewolf’s yellow eyes gleamed with curiosity in the dark as the scientist turned to shut the door.

“Evening, Mia,” he replied. He was a rather short, plump, nerdy looking man in his mid-thirties, messy medium length brown hair sticking out at all angles and round glasses sitting atop his nose. “I see they’re keeping you well fed.”

“Hardly,” the shewolf replied, moving just a little closer to the glass. “ A deer. A tiny little thing! Haven’t had a good meal since you people put me in here.” She placed a hand on her ample hip. “Why are you here so late? Drawing more blood?”

“No,” Sam replied simply, setting his bag down on the counter. He unzipped it and began to rummage through its contents. “No more drawing blood. In fact, If you’re good maybe we can see about getting you something better to eat.” He retrieved a small, long case from within the bag, taking it in one hand and turning to approach the containment cell.

“Oh really?” Mia crooked her head at him curiously. “ Going to let me out of here, are you? That’ll be the day.” Her heavy black tail began to wave back and forth behind her.

“I am,” Sam replied. “Well, I already have technically. All the cells will open in about five minutes. I took care of that on my way in.” He eyed the shewolf pensively, marveling at the sheer size of her. When the moon wasn’t out, she was a remarkably tiny woman -barely five feet tall when she had first been captured, though each time her height had been measured in the months since she had been growing steadily taller and bulkier even as a human.

Mia laughed disbelievingly at this news, a horrible booming sound blaring through the speakers. “Is that so? Why would you ever do that Sam. You know what would happen.”

“You would break free, escape into the desert and run amok on the town,” He replied simply. “And the next town the night after, and the next one after that. Most of you don’t even really need the moonlight to change. This whole state would be dead or turned within the month.”

“Yes,” Mia agreed. “That’s about right. But I thought you people were working to cure us?” Her wide, many-toothed maw grinned at him mockingly.

“I was,” Sam admitted. “At one point, I was. But what you’re infected with is unlike any virus I’ve ever seen. Constantly adapting, resistant to everything we tried. Killing it, even weakening it seems impossible. We thought we had a vaccine at one point… and then a month later our test subjects all turned. My theory is that this virus feeds on something… ancient in our DNA.” He smiled at Mia, pushing his glasses up the bridge of his nose. “Yes, I tried, but I think I’m ready to admit defeat. We have a few of you contained, but it’s pointless. Wherever this virus came from, In a matter of months it will have spread across the country, maybe the world.”

“It feels… goooood, Sam…” Mia groaned through her barred fangs, a clawed hand squeezing at a massive breast. “I feel.. powerful. Confident. More than I ever did before. Why wouldn’t we share this gift?”

“Maybe we were wrong to try to stop you,” Sam replied, unzipping the small case and retrieving from within a small syringe and a vial of clear liquid. “Yes… it’s clear that werewolves will soon be the dominant species on this planet. We can’t beat you Mia… so I intend to join you.”

The massive wolf laughed once more, pressing her face against the glass to peer down at him. “Want me to give you a nibble? I think you’ll make a big strong wolf! The fat ones usually do.”

“That won’t be necessary.” Sam uncapped the syringe, drawing it full of the clear liquid from the vial. “What do you think this is?”

“Why don’t you tell me?”

“Well, when I realized I couldn’t cure this virus… I set some samples of your blood aside and starting trying to make it… well, worse? Better?” Sam dropped the vial onto the floor, rolling up the arm of his lab coat and undershirt. “All the genes that controlled protein generation, growth, rate of reproduction… I enhanced each of them, and the changes I made took remarkably. He raised the needle up towards her. “This is the result. Pure virus, a hundred times more potent and concentrated than it would be delivered through a bite or… well, sexual fluids.”

“Oh really?” Mia eyed the scientist hungrily. “Assuming that doesn’t just kill you… what will it do?”

“If it works… then I’ll be much more than just another werewolf. I’ll be… well, the alpha, the apex predator, the… eventual king of this new world.”

Mia laughed yet again, louder and more wickedly than ever, Sams already shaky legs quaking from the vibrations.

“Well, what are you waiting for then?”

“Yes,” Sam replied, uncapping the needle, “You’re right. Well, if this doesn’t go as planned… I’m sorry we did all this to you Mia. Good luck out there.”

“Good luck yourself, my liege…”

Breathing unevenly, Sam raised a shaking hand and plunged the needle into the center of his arm, pushing down to release its contents, his arm stinging painfully as they flooded into his bloodstream. Empty at last, he cast it aside to clatter onto the floor.

“Well… no going back now.” Sam felt hot almost immediately, his mouth going dry and leaving him breathing heavily. He stepped towards the window in the ceiling at the center of the room, into the most direct moonlight he could get in here.

“How does it feel, Sam?”

“Urgh… like my skin’s… crawling.” He clutched his bicep, and indeed could feel the musculature beneath beginning to spasm wildly, lances of discomfort running through the limb and growing steadily more frequent. “Oh! A-aah…! I-I think it’s… RRRRRGGGGHHHHH!!!”

It was like a bomb had gone off inside of him, fire coursing through his veins and into each of his limbs. The virus has fully circulated through his body and now the muscle spasms had spread all throughout him. Sam clutched his chest, his heart throbbing wildly as it struggled to process the chemical reaction taking place. He tries to steady his breathing, recalling to himself the steps of the transformation which he had witnessed and documented countless times over the last few months.

Step 1. The heart swells to triple its original size, skeleton begins to expand to accommodate growing organs.

Sam screamed in agony as his hands and arms crunched audibly, the bones stretching longer, his hands and fingers already more than twice their original size. His fingernails began to darken and thicken, sharp claws beginning to blossom from them as he felt his toes doing likewise within the confines of his shoes. Ankles began to protrude from his pants as he stretched a full foot taller, and dark hairs began to sprout from his ankles and arms alike.

Step 2. Claws and fangs begins to grow. Hair thickens, ears begin to change shape.

“AAHHH! AAAAAHHHH!!!”

Sam curled forward, shuddering as his torso was wracked with a series of sharp pains. His ribcage and sternum crunched outward loudly, the buttons of his lab coat straining briefly before bursting off of him, the coat flying open to reveal a t-shirt beneath that was itself stretched to capacity by a combination of his pudgy stomach and suddenly much broader chest. The sounds of strained, ripping fabric began to fill the room.

“Well… looks like it’s working,” Mia observed, one massive hand playing at the dark wet lips of her nethers as she did so. “You’re getting to the fun part next… How does it feel, Sam? Like hoped it would?”

“H-hurts…!” Sam grunted, his voice deepening as his neck stretched longer and thicker, veins protruding from thick cords of muscle. Another spasm rocked through his chest, and his shirt at last gave way as his pecs ballooned outward with taut muscle, his belly bouncing free as the shredded fabric of his lab coat and shirt fell to the floor. Already over seven feet tall, he stared down to marvel at his rapidly mutating and expanding form, the tremors running through his body foreshadowing what he knew was coming next.

Step 3. Rib cage expands. Body fat burns to rapidly produce energy -uwwwhh!

His stomach gurgled audibly, his insides bubbling and burning as his gut began to melt away as the muscles of his midsection began to simultaneously swell and pop outward. As his middle narrowed, definition began to increase, sets of abs popping outward two at a time as his bone structure continued to stretch taller and wider. His heartbeat pounded away in his ears, slower but a hundred times mightier than it had been before, each thump-thump of the massive organ fueling his body to grow larger. As his ears took on sharp points and began to migrate up the sides of his now much hairier face, he noted to next steps as he began to feel them gearing up to begin.

Testosterone production drastically increases! Muscle tissue swells! Sexual characteristics expand! Arousal… increases…

“ O-Oh… Ohhh G-GOD!!!”

Thick sinew inflated his back as his shoulder blades crunched apart to spread his upper half even wider. Sam thrust his chest upward as his body inflated with primal masculine power, his biceps ballooning to over 40-inch-thick mounds of steel and a fifth set of abs popping into place. His pants mercifully at last gave out, long tears down both legs spreading until they were ripped apart, leaving him clad in nothing put a pair of boxers which were clinging on for dear life, the massive head of an angry red cock which had swollen to over a foot in length straining against the waistband. This was different from his past subjects. Most took five or more minutes to fully change, yet he had injected himself barely a minute ago and already was as large as most full grown specimens contained in this facility.

“URRRK!!!”

Sam fell forward onto all fours, losing his balance as the bones of his legs curved unexpectedly. His massive form trembled as he felt the next wave of the transformation begin to seize him. His thighs bulged outwards, glutes swelling and firming with muscle. His vertebrae strained against his flesh all down his powerful back, a hairless tail pushing rapidly outward from atop his ass.

Step 4. Rapid… growth… Bones… get… denser… longer, muscles undergo… rapid… expansion. Tail sprouts…!

“GRRRAAAUGH! RRRRRUUUUURRRRRGGGHHH!!!” He grit his fangs against the pain as his entire body strained larger, his already substantial size nearly doubling in a matter of seconds. His underwear ripped free, the floor of the lab being splattered with a thick puddle of precum as his cock flopped out onto it, a cock which was swollen harder than he had ever thought possible and grown so impossibly large that no human could possibly take it inside them.

…But there was a female worthy of it just feet away, wasn’t there? Sam looked up at Mia through the glass, his formerly green eyes have turned fully golden as he eyed her ample nude form lustfully, deep heavy breathing accompanying the wet popping of swelling muscle and crunches of growing bones.

“Almost there,” Mia teased, sliding her wet loins against the glass tantalizingly in response to his blatant desire. “What a tasty hunk of meat you’re becoming! I hope you did open the doors. It’d be a shame if we couldn’t have our fun.”

Step 5. Subject… reaches… final… size… Fur thickens… jaw extends… Features become… wolf… I AM WOLF…!

Wave after wave of undulating tension filled his hulking nude form, veins throbbing along every inch of him as the fire of transformation surged through him. He moaned as his agony began to dim in favor of pleasure, thrilling with every sensation of swelling larger, taller, thicker. With each throb of growth, another burst of heavy pre would trickle onto the tiled floor. His hair turned from brown to white and began to thicken all over his body into a heavy coat of fur. It was nearly done. All that remained was-

“UUURRRFFF!” Sam grunted, his jaw cramping and his fangs growing thicker and sharper. His mouth and nose began to crunch outward in a series of bursts, a huge muzzle growing to protrude from his now fully wolfen face. He thrust his head back, a savage roar echoing throughout the building as the last of his humanity left him and a final series of crunches and pops saw him swell several more feet in height and girth. His change finished, he collapsed onto the floor, his legs kicking out at the desk behind him, accidentally sending it flying back against the wall from the force of the impact. There the newborn wolf lay, a massive white furred behemoth stretching from one end of the room to the other, panting and heaving from exhaustion.

“Tired, are we?” Mia’s low voice boomed through the speaker once more as she eyed the bulky heap of white fur on the other side of the glass. “Better hurry get up, or they’ll lock you up like m- “.

Her words trailed off as the grinding sound of heavy machinery issued from above, and the glass walls of her containment chamber begin to rise up into the ceiling. Mia snorted and chuckled lowly as she watched it do so. Throughout the building, a chorus of howls issued down the halls, signaling that many others were likewise being freed.

“You really did it!” she barked in astonishment, taking a step closer as the glass rose high enough that her head could clear it. She sniffed the air, her eyes going wide. “God… you smell… manly… delicious.”

A heavy fist slammed into the floor, cracking the tiles beneath it. Another joined it a moment later. Sam pushed himself slowly first to his knees and then shakily up further onto his feet, shoulders hunched and head mere inches from a ceiling that had been meant to be high enough to comfortably accommodate the largest of werewolves. He was easily over fifteen feet in height, several heads taller than Mia and much bulkier. The biggest and strongest wolf in the building beyond any doubt.

And this is just the first change! He knew from his studies that a newly turned wolf would be significantly larger with each subsequent moon before reaching full maturity. Pride burned in his chest at the realization that his experiment had been a success, but the rising fire in his loins was rapidly seizing his attention.

“Ohhh…” Mia breathed, eying Sam’s swollen red length, larger and thicker now than his entire arm had been as a human, clear musky fluids dripping steadily onto the floor between them. “Just look at that thing. I know just where to put that.”

The wolfess turned her back to the male, bending low and thrusting her ample rear towards him. She seized both her massive ass cheeks and spread them wide, presenting her own dark and dripping wet sex to him.

“Hurry up, big boy,” she rumbled, her rear swaying back and forth. “We need to get out of here.”

The sounds of gunshots had joined the distant howling, as well as the heavy thuds of metal being bent and torn apart. A breakout was in full swing it seemed, and Sam knew he and Mia would need to join them -they would be his pack, and he their alpha. But before he could focus on anything else, he would need to rid himself of this overwhelming lust. He had chosen to transform here for a reason. Ever since he had been assigned to study Mia, he had fantasized about fucking her with every stolen glimpse of her enormous well-muscled ass and heaving breasts. Now that he finally had a cock worthy of the job, he would waste no more time on fantasies.

The massive white werewolf lumbered forward, hands seizing Mia’s wide hips. Letting out a low lustful rumble, the powerful muscles of his legs flexed as he sunk balls deep into her hot depths with a lewd wet squelch.

“URRRRGGGGHHH…”

Mia groaned as she felt his throbbing flesh force its way into her body, spreading her wider than other previous mate had ever managed. A steady stream of pre spurted from his head into her pussy as it squeezed back at his immense maleness.

Sam’s bowling ball sized balls slapped against Mia’s ass as he felt a barrier bring his first thrust to an end. Her cervix. The feral stud let out a guttural moan and drew back, the head of his cock brushing pleasurably all along her walls on the journey back. He thrust forward again, and again, finding a steady rhythm, the plap plap plap sound of their flesh slapping together getting louder with each thrust.

“NNNGGGGHHHHHH…! F-FFFFFUCK!!!” Mia moaned, eyes rolling into the back of her head, sharp claws digging deep into the tile for support. “YESSSS… JUST LIKE THAT! MAKE ME YOURS!” She thrust her ass out at him, her huge dark globes crashing against his hip again and again.

“You… already… are…!” Sam panted hotly, his hips slamming into her jiggling cheeks over and over as he fucked her cunt without mercy. Feeling his balls tightening and churning, he let out a feral cry of lust and sank himself as deep as he could fit. Mia returned it, her depths squeezing at his throbbing length to milk it for all that it had as a torrent of thick, virile sperms began to spray from him. He flooded her, filling her womb to capacity but showing no signs of stopping, seeming gallons of thick white fluid beginning to spill out from her onto the floor. Shuddering with orgasmic pleasure, Mia felt her womb throbbing as their mating unknowingly triggered ovulation, numerous eggs dropping down for his seed to instantly take root in.

They each went quiet as orgasmic bliss swept over them, panting heavily in the dark lab as the sounds of combat grew louder and closer. At last, Sam drew back, his massive rod popping wetly out of Mia’s cunt, sending a flood of gallons of their mixed release to fountain out of her onto the floor.

“Need to go,” he grunted, rising up to his full height briefly only for his head to strike the ceiling. He cursed, stooping down lower as he began stomping towards the door. “Come.”

“Yes…” Mia panted, rising to her feet. She hurried after him. “Yes! Freedom!”

The human-sized steel door was too small for either of them, but it would be no obstacle to their escape. Sam slammed a fist into it, sending it flying from its hinged to slam onto the hallway floor. With another mighty punch he blasted a hole in the upper wall, expanding the doorway to just larger enough for them to squeeze through. The white wolf ducked into the doorway.

“Find others. Help them escape.”

They would gather their pack, get them to safety somewhere out in the wilderness, and then the work would begin. Sam would make sure that their numbers would swell like never before, and none would contain them ever again. When his ascension to true wolfhood was completed over the next few moons, no other lycan could ever hope to challenge his reign. It would be he and his pack to rule over what remained of the world when all was said and done, of that he had no doubt.