Unexpected Gains

Story by Matkaja on SoFurry

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It's early in the morning, and the wolverine Odin, the hyena Sam, and the panther Leo are up to no good. They have nicked the access credentials for a storage room and are ready to abstract some valuables. After a disappointing start, the haul quickly becomes their most memorable yet when they discover a vial with strange contents. One unfortunate accident later, the three males find themselves transformed and quickly give in to new, irrepressible urges that have come with the transformation.

This story is another quick smut fic centered around muscle growth and hyper fun like "The Super Soldier Potion," but this time with less magic and more mad science at work. Of course, it contains a colorful transformation sequence, rough and partially non-consensual gay sex (but those horny boys end up loving it™), cum inflation, size difference, and even a comeuppance of sorts for the three thieves. If this intrigues you, give it a read! And after that, I would love to hear your thoughts and comments.


It was early in the morning at the trade station. All hallways were dark and deserted, and most of its residents were still fast asleep. Only the wolverine Odin and his two companions were already awake and had gathered around a security door in the rearmost part of the complex. Each of them was wearing the same outfit, a pair of blue overalls with a white shirt, gloves, and a black cap carrying the insignia of the station's owner, which they had nicked them from the laundry shop. The wolverine pulled a keycard from his fanny pack and swiped it through the card slot while instructing his partner to enter the passcode, "1-6-5-5. Punch it in, Leo. I can't wait to see if that idiot really spilled the beans over a single beer."

"Well, that mole never stood a chance against you, Odin. That guy wasn't even half your size, and I'm pretty sure that he's currently having the hangover of his life," Leo laughed as he entered the combination. "He probably won't even notice that his card's missing." A green light flashed up as the console accepted the input, and a second later, the door slid open to reveal the dusky insides of a vast depot. Countless shelves and pallets stood tightly together, each available inch stacked with boxes, crates, and barrels of all sizes and colors.

"Welcome to the treasure trove, boys," Odin announced with a toothy grin on his muzzle and stepped through the door. His movement triggered the motion detectors, and the overhead lights went on one by one, immersing the depot in a cold glow. The wolverine hurriedly pulled his cap down low over his face, hiding it from the few cameras scattered around the room. The powder in the coffee machine next to the surveillance room was laced with sleeping pills, so the guards should all be asleep, but he wanted to minimize the risk of being discovered. "Sam, you go over the right third, and Leo, you do the other side while I'll take care of the center. Try to look like you're just inspecting stuff, alright? Now, let's get moving!"

The hyena and black panther nodded in unison and slipped behind Odin into the hall, each hurrying into their own corner to scout for the biggest loot. After the wolverine had closed the door to prevent any surprise encounters, he turned around to his own third, pulled out a notepad, and quickly stepped through the rows, skimming the goods for anything valuable, optimally something they could carry away in a single pocket. Unfortunately, most of the boxes contained only cheap consumables and food, most barrels were too big and heavy to carry, regardless of their content, and the few parts of expensive machinery scattered about the storage space were too delicate and too conspicuous to steal. There were a few crates with hazard symbols as well, but even though they would definitely make them a pretty penny on the black market, he didn't want to risk it.

Odin's euphoria about the initially successful break-in had all but vanished as he reached the last shelf when he heard a call from his left. "Hey, guys! I've found something."

Not missing a beat, the wolverine whirled around and raced down the aisle toward the waving black panther. "Finally! It took you long enough. What did you find, Leo?"

Leo patted a wooden crate and purred, "I don't know what's inside it yet, but I know that it's valuable."

Finally, Sam arrived as well. The hyena warily eyed the crate and followed up, "How do ye know it's worth anything, then?"

"Do you see that crossed red circle? This sign means high-priority, and whatever is high-priority, probably is also high value," Leo explained.

"Yeah, I see it. Are you sure that that's what it means, though?" Odin asked

The feline nodded firmly, "Yes. I've worked for a shipping company, remember? And they literally used that sign to mark their urgent stuff."

"I-I actually don't know if that's a good idea anymore. It's probably some urgent medication or something," Sam objected warily, his ears lowering.

"Are you getting cold feet again, Sam?" the wolverine growled playfully.

"Fuck, I thought we'd steal a gold bar or a few gems. Something simple. Something difficult to track and not so unique that everybody will immediately notice that it's gone," Sam whimpered uneasily.

"Nah, we'll be long gone when they notice. Once we've checked the content, we'll carry it right to the ship and leave as if nothing ever happened," Odin assured him. Meanwhile, Leo had already begun to open the crate. Too lazy to fetch a proper tool, the panther used his claws to pry the lid off, one nail at a time. The wolverine joined him, dealing with the other side, while the hyena just watched them with furrowed brows.

Sam's scowl suddenly turned to disbelief when the others removed the lid, and he blurted out, "Guys, I think they mislabeled it. There's a bunch-a' fruit inside, bananas and stuff."

"Bananas!? What? Leo, are you sure that the red thing means what you think it means?" Odin snarled when he saw that the hyena was right.

The black panther shrugged and rolled his eyes, "Yes, I do. Dunno. Maybe it's some food for an executive dinner. Those rich moneybags probably don't mind the extra fee for urgent shipping."

"Damn!" Odin dove into the crate and angrily dug through the food, hoping that something else was hidden among the worthless fruit. Initially, he couldn't find anything worth mentioning all the way from the top to the bottom of the crate, but then he noticed a sparkle from the corner of his eye. There was a small black box bolted onto the side. He hastily leaned over and just ripped the thing straight off, holding it up like a trophy. "Or maybe there's something worthwhile in there after all!"

His companions gasped with surprise. While Leo was excited to see that he had been right with his intuition, Sam was getting even more uncomfortable, tucking his tail between his legs. "But what is that thing?"

"That's what we're going to find out about right no-ooops..." As the wolverine spoke, the box opened in his sticky paws, and a small vial dropped out. Before any of the three could react, it crashed onto the ground and burst with a sharp ping, scattering a colorless, volatile liquid. "Fuck!"

"I told ye this was a bad idea from the start," Sam grumbled and crossed his arms. "Whatever it is, it's gone now. This was a huge waste of time, so let's cut our losses. The sooner we leave, the better."

Odin blushed with embarrassment and admitted through gritted teeth, "Yeah, shit. This was supposed to be a big hau... Woah, what's happening?" Suddenly, his vision flashed, dark spots appeared before his eyes, and his ears rang with a high-pitched buzzing while his sense of smell became hyper-acute. It felt as if somebody had pulled cotton wads out of his nostrils. He could distinguish the smell of every single fruit in the crate, and he even sensed the odors of his two partners, the pungent musk of the hyena and the slightly sweet aroma of the panther.

The surprised grunts and cries of the others told the wolverine that he wasn't the only one experiencing these changes. "It's the vial! Quick, get away!" Odin yelled and hastily stumbled away from the crate until he inevitably tripped over his own feet and smacked face-first into the floor. He heard an audible crack as he broke something inside his jaw, and he groaned as a surge of pain rushed through his body. But not even two seconds later, the pain dulled already, and a wave of sweltering heat coursed through him. The new sensation permeated him from his toes to his ears and veiled his brain in a dense fog, muffling his thoughts and his panic until only one sense remained, his sense of smell.

It was only a matter of time until Odin inhaled, and the smell of the fruit washed through his nose once more, activating his scent receptors and triggering a violent reaction. The wolverine started to drool excessively, creating a puddle of saliva within seconds, while his stomach turned into a bottomless pit. He hadn't eaten since yesterday, but it felt as if he hadn't eaten in a year. The sharp sting of hunger forced him back on his legs and made him stagger to the open box of food.

Without a single thought in his ravenous mind, the wolverine shoved his paws into the fruit and grabbed the first two bananas he could find. He didn't waste any time on peeling them and just opened his muzzle as wide as he could, ramming them into his gullet and devouring them whole without chewing or swallowing. Meanwhile, his paws already guided the next couple of fruit to his gaping maw, and he stuffed them after the others with no rhyme or reason, stray bits and juice squirting everywhere, soaking his paws and his clothing. Not even a whole coconut could stop him, even when it literally unhinged his jaw before he managed to wrench it into his throat. There was no gag reflex, there was no pain, there were seemingly no consequences as his stomach swelled to an unholy size, bulging his belly and tearing through his overalls with several palpable lumps.

Odin's hunger persisted even after the crate was empty. His growling belly demanded more even though it was stretched tightly around at least 200 pounds of food and had grown large enough to obfuscate his view. The wolverine looked up with a desperate whimper, hoping to find something else to satisfy his craving, but he only spotted the hungry, disappointed faces of his companions. In a lapse of reason, he considered devouring one of them instead, baring his teeth and clawing at Sam. Luckily, his bloated belly kept him from moving, effectively stopping him from putting his delusional plans into practice. Instead, he simply dropped down the side of the crate and onto his swollen body, heaving heavily and sweating profusely while his guts processed the unreasonable stuffing in record time.

To make matters worse, the wolverine's insides began to shift, and his body grew to accommodate and distribute all the additional weight. He barely even noticed it until the noise of ripping fabric made his ears perk up. His boots had burst, his overalls were torn, and his shirt was reduced to tatters. His pulsing, sweating flesh pushed and bulged through every available opening, growing and swelling as the nutrients from his excessive meal spread through his body. First the ravenous hunger, now this! What was happening to him? But that thought left his brain as quickly as it had come. For better or worse, the cause of Odin's unexpected transformation also muddied his mind and numbed his senses, keeping his panic and discomfort at bay.

The male spent the following minutes in a mental twilight, barely conscious and without a single clear thought in his mind. The transformation only slowed down as the last ounce of food had been digested, and finally, the throbbing in his limbs ceased, and the shifting in his guts faded. As if he waking from the strangest dream, Odin rose from the ground with an awkward groan and rubbed his eyes. Already while he was rubbing, he noticed that his paws were heavier and stronger than before, and when he finally looked at himself, he saw that the transformation had left him bare-naked, the shreds and tatters of the stolen outfit scattered around him. His gigantic belly was completely gone as well. Instead, he had been blessed with the body of a god, bulging muscles and shining fur as far as he could see. His swollen pecs proudly adorned his chest, his abs had turned into a rock-hard six-pack, and the circumference of his arms had easily doubled. And the changes hadn't just brought power, but potency as well, bestowing him with a fat 16-inch rod of cock meat and a pair of nuts so big that they almost qualified as a beanbag. "What the hell was that stuff," the wolverine wondered, wincing at his own deeper, rumbling voice.

A snort from the other side of the crate snapped Odin out of his self-admiration and reminded him that he wasn't alone. The wolverine was pretty sure that his companions had lived through the exact same fate, so without wasting another moment, he jumped up and rushed around the box to check on them. He spotted Leo first. The black panther had been knocked out by the transformation, lying with his butt-naked body on the floor. He had become just as buff and hung as the wolverine. His sweaty dark fur shone enchantingly in the light of the fluorescent tubes, thinly veiling his bulging definition, and his pink kitty pecker had grown into a giant bitch-breaker. It wasn't the first time that Odin had seen the panther in the nude, and he had fooled around with him and Sam before, but he had never felt so intensely about it. He had always liked Leo and his looks, but now, he craved him with an almost painful desire, his muzzle watering profusely at the feline's sight while his arousal grew uncontrollably. He had to breed him.

Odin dropped onto his knees and grabbed Leo, crudely spinning the unconscious panther onto his belly to get to his delicious ass. Once the feline was in the perfect position for mounting, the wolverine pulled his long black tail aside and spread his butt cheeks to reveal the target of his efforts: a puffy pink pucker begging for a filling. It was sopping wet for some reason, drooling with natural lubrication, and the view completely overrode any sanity Odin had left. He jumped onto Leo's back, firmly grabbed his body, and pressed his swollen cock against his muscular butt, eagerly grinding it against the firm flesh and tight ass crack a few times before he aligned his tip with the panther's anus.

The moment the wolverine's tip kissed Leo's pink entrance, he awoke and quickly realized that something was off. "The fuck? Why am I naked? What happened? What's that at my butt?" However, instead of an answer, he only received the first few inches of Odin's cock, and his voice twisted into a guttural roar as his unexpected partner started slamming his dick even deeper.

The panther's insides were hot and tight, stretching snugly around Odin's schlong and triggering a burst of pleasure that threw him into a feral rage. He snarled and huffed through clenched teeth, wrapping one arm around his partner's neck and pulling him into a tight chokehold.

The feline gagged and teared up, whimpering, "Odin? Is that you? Wait a sec!"

"Fuck, so tight," the wolverine grunted before unleashing his whole strength onto the panther's sorry ass. He hammered his cock into him with no mercy or consideration. He was only concerned about his own pleasure, and he had a lot of pent-up arousal to take care of and a few more inches to go.

Leo's screams echoed through the entire depot, and he desperately struggled against the wolverine, but he was too weak to stop him. More than a foot of fat, turgid cock meat was stirring his guts and bulging his belly, whipping up a storm of stimulation that ripped his mind to shreds and turned him into a limp puppet in Odin's grip. His legs and arms lost all their strength, and his tail dangled uselessly to the ground while his body and his mind surrendered to the assault.

Once the initial shock faded, Leo was hit by the same primitive lust that had corrupted the wolverine. His dick throbbed to life, swelling and inflating to full-mast in no time, and his agonized howls became twisted with lust. By the time his partner bottomed out, he was finally begging for more. "Odin, harder! Fuck, I need it! Breed me!"

The panther's hoarse cries were music to Odin's ears. The wolverine cackled triumphantly as he gave his horny partner what he was asking for. He battered his entire cock in and out as fast as he could, ruining every last inch of Leo's tight hole with his enlarged endowment and pummeling his taint with his bloated sack.

The wolverine's horny confidence, however, took a significant blow when a pair of heavy paws suddenly tightened around his shoulders. The screams had attracted the third male of the gang, and he was eager to join. "Ya've talked me into this mess, Odin, and now Imma breed yer snug ass," the hyena grunted and slapped his butt.

Odin snorted in surprise and stopped pounding the panther to throw a glance at Sam. He was prepared to see another beefy hunk like him and Leo, but the sight he got actually exceeded all his expectations. The hyena had grown into an even taller colossus, towering over them with upper arms as big as his head, gigantic pecs and steel-hard abs, massive shoulders, and a toothy grin. He had already aligned his huge black cock with the wolverine's rear entrance, so he couldn't quite see how large it was, but he knew that it was bigger than his and that it would go all the way inside him right now.

Even though the wolverine was more aroused than ever and his asshole soaking wet, he wasn't ready for the inevitable penetration. Sam shoved his dick into him with brutal force, splitting his ass wide open and impaling him on his massive rod. Odin felt it throbbing and leaking inside him as it slid deeper and deeper, crushing his prostate and distending his midriff. He burst into a profuse scream when the hyena started to ream him with the same vigor he had granted the black panther. The tables had turned, and he was now the howling cocksleeve, but just like Leo, he quickly snapped under the pounding and became a slave of his lust. "Oh, fuck yes! Harder! Break me!"

The black panther joined the chorus, getting Odin to move his hips again and continue to fuck him while Sam buried them both under his massive, musclebound body, ramming into the squirming, moaning pile with reckless abandon and turning the two smaller males into his sluts.

The next few minutes flew by for the wolverine. He never stopped bucking his hips, sinking his dick deep into the panther's ass while his own insides got wrecked by the hyena. He could barely breathe, sandwiched between the two beefed-up males, and every whiff of air was rank with the scents of their sweaty, musky bodies, fueling his feral lust and driving him ever closer to the edge.

In the rush of the moment, Odin grabbed Leo's head and pulled him around to kiss him. Without warning, he pressed his lips onto the panther's gaping muzzle and eagerly thrust his tongue into his maw while he slid his other paw into his crotch, grabbing his dangling cock and jerking him vigorously.

Leo's first reaction to the extreme french kiss was a loud gag as Odin's tongue plugged his mouth hole and suffocated his cries, but he soon melted into his partner's feral affections. He returned the kiss with passion, tying his tongue around the wolverine's, and indulged in the reach-around, grinding his dripping cock into the tight paw until the ceaseless explosion of stimulation finally broke him.

The black panther reared up and tore himself away from the kiss, roaring out as a powerful orgasm seized control. His nuts tightened, and he unleashed a gigantic torrent of jizz. Ropes of cum arched high through the air, painting the floor, the surrounding crates, and his own torso milky white while the thrusts of his friends drained his prostate and milked him dry.

The feline's clenching asshole triggered Odin's climax not a moment later. The wolverine's lust-ridden mind shattered with a bright flash, and he joined the roar, booming with bliss as he slammed his cock into the panther one last time. Everything inside him started to tense, tighten, and churn, stirring up his potent seed and pumping it deep into the wet, warm hole. With every twitch, he squirted another fat wad of cum into the feline, and the flood just never ended, filling Leo and swelling his belly until he looked positively pregnant with wolverine semen.

Sam was the last of the three to unleash his new potency. While Leo and Odin had run dry already, he kept thrusting into them with unwavering force, turning them into a howling and writhing heap of post-nut hypersensitivity. However, even the most blessed of the gang finally succumbed to the pleasures of the flesh and burst with a deep growl. With twenty inches buried inside the buff wolverine, he blasted his first squirt right against his diaphragm.

Odin gasped and groaned but didn't get much time to recover as the second spurt already shook him to the core, and the next ones followed rapidly. Without a single break, the hyena pumped him full with his thick nut, and his output surpassed anything he had ever experienced many times over. The wolverine heard the cum sloshing and gurgling as it streamed through him, felt the incredible heat and rising pressure as it added up, swelling his belly and inflating it into a massive ball in no time. His flesh groaned and creaked as it struggled with the limitless filling, and by the time Sam was done, Odin didn't even look pregnant anymore; he just looked fat and bloated with jizz, his gigantic cum belly drooping to the ground and pressing against Leo's back.

The wolverine fully expected his bulky partner to yank out his dick and discard him like a used condom because that's exactly what he looked like right now, but luckily he underestimated him. Now that Sam had unleashed his pent-up lust from the transformation, he recovered and calmed down from his feral furor. So when he actually pulled out, he did so with tender care and a slobbery kiss onto Odin's neck. Only the gaping, ruined crater he left behind bore witness to the violence that had been at work until a few moments ago.

"I don't know what happened just now, but fuck me, I look good," Sam cackled, playfully flexing his guns and weighing his dripping cock. Eyeing his wasted companions, he added, "And fuck me, ye're lookin' delicious as well. Seems like I've been wrong all along, and the raid wasn't a total bust after all. We didn't get anything to sell, but we're definitely the three hottest hunks in the world now and had the best fuck ever."

"Yeah, I don't know what happened either, but we look amazing now, and this was absolutely the best sex I've ever had. Leo's ass has never been tighter. But all the fun aside, we should definitely get going now," Odin groaned. "Shit, this is the biggest mess I've ever seen, and most of it is inside me." The wolverine sluggishly rubbed his inflated belly before he pulled out of Leo and tried to get up, failing miserably. His legs were shaky, his ass ruined, and despite his best efforts, he failed to even just get up onto his knees, only flopping from side to side.

Leo shared the wolverine's struggle. The black panther squirmed on the floor like a fish out of the water before giving up with a sigh. "Damn, I can't even get up anymore. Way to go, boys."

"I think I can help you with that," Sam laughed and rubbed his paws. The hyena bent down between his two companions and hooked one arm under each of them, slowly pulling them up onto their feet.

"Now, we only need to get back to the ship without anyone noticing," Leo groaned. "Our disguises are ruined, and I don't think any of our other clothing is going to fit either."

"Look at it from the good side, Leo. Now I get to see your juicy ass even more than usual, and you get to see more of ours," Odin joked weakly, triggering an eye-roll from the panther. "But let's move before we get carried away. Ugh, I think I'm getting horny again. What is this?" The wolverine's cock had swollen back to full-mast, and he noticed that his companions were rock-hard as well. Sam had even stopped talking again and just eyed them hungrily, licking his lips and drooling like a predator inspecting his prey. "Sam?"

"Ah, shit, sorry. I somehow can't help it with two snacks like you," the hyena cackled and shook his head, trying to clear his head before he started to walk toward the door.

"Save it until we're on the ship, okay?" Odin retorted, his face reddening with a blush at his unusually confident and flirty companion. Whatever had been inside that vial, it had changed their brains as much as their bodies. The coming days promised to get interesting, but they really had to get away from the station as far as they could so whoever owned that expensive serum wouldn't find them while they were distracted by a lot more intimate bonding, endless sex, breeding. Fun times lay ahead for sure, but this would definitely be the last time the wolverine snooped around other people's stuff. There could've been something much worse in that vial, and with merely a bloated belly and a sore, gaping ass, he had learned his lesson.