Gym Bunny (Mirko TG)

Mike was your typical overweight nerd, not obese but years of a sedentary lifestyle had taken their toll on his increasingly pudgy form. As much as he wanted to ignore it, he could feel himself getting less healthy by the year, and once he started feeling winded going up a single flight of steps, enough was enough. Mike being Mike though meant plenty of delays, plenty of stalling till somehow a year had passed and his weight had continued its gradual incline. After an embarrassing ordeal trying to fit into one of his favorite outfits for a New Years party before giving up on anything without an elastic waist, he decided to finally bite the bullet and buy a gym membership.

"Moshi Moshi! Welcome to Otakinniku!"

Of course just cause he was joining a gym, didn't mean he was going to one of those standard testosterone laden affairs. Hell no. What he wanted was some nice escapism alongside his workout routine and thankfully one of the weebiest spots had opened up fifteen minutes from him complete with Japanese maids at the front desk and all sorts of glowing reviews. It even offered for a special extra fee a "rush course to your dream anime bod" that had enough positive reviews to sound legit and the idea of losing a bunch of weight as fast as possible was exactly what he was looking for.

Part of him half expected it to just be a regiment of like bicycle and treadmill stuff while watching One Piece or something, but instead he was given an option of cups once he explained what course he had signed up for. Various anime characters littered the tray of what vaguely looked like a pinkish protein shake. Mike just shrugged and picked one with Mirko on it, the girls clapping at his choice as he gave it a sip, expecting the worst. Instead it was tasty but hard to describe, making his tongue tingle.

"Sugoooi! Now just come to the sauna room to sweat out the toxins and you'll be ready for the main routine!"

So far easy, Mike following them to a changing room as he was left on his own to change into gym shorts and a towel. He felt good, really damn good as if just starting was getting him excited, his skin tingling as he moved into a Japanese style sauna. There was only one other person in there, an androgynous person who looked oddly familiar though Mike didn't want to stare too much. Besides the heat and steam quickly started hitting him as he began sweating profusely, not needing long to start panting.

According to the girls he had to stay for fifteen minutes to "maximize potency of workout" which he didn't quite understand, but he wasn't a workout scientist or whatever the term was. His mind mostly wandered as pores unclogged, Mike unaware of his leaking hairs as dead skin and imperfections sloughed off, tanner streaks appearing as if he was in a tanning bed instead of a sauna. Green dots beaded and spilled, bits of fat melting out not all at once, but enough to make his skin look tighter even if it was bulbous, his heart beating loudly as he groaned wondering if he could take the next ten minutes.

At least he was doing better than the other... girl? Their groans sounded much more involved, the steam too thick to see much though he swore they were almost grinding against something, vague outlines of arms moving as the gasps climbed. The whole thing sounded sexual, Mike mesmerized by the vagueness, his own cock stiffening as it made the minutes pass easier. Their figure kept bobbing, some odd crackles synced up with the grunts though he assumed that was the sound of the hot rocks, though the source of a wet slurping sound was completely inexplicable, not that he cared after hearing the now obviously feminine sauna mate squeal before gasping for breath.

"Nngh mmmh d-doooone. Yeah..."

There was an awkwardness as she stood up, as if she wasn't quite used to her center of gravity, though Mike just assumed that was dizziness from however long she had been in there, though he couldn't believe he had thought she could have been a man. Sure her hair was short but her figure was very curvy on top of muscular, her hips swaying as he realized she was topless. He did his best to look anywhere else as she stumbled out, a few more pleased groans leaving her lips as he glanced. At least he had figured out why she had felt familiar, the girl a dead ringer for Mikasa from Attack on Titan.

With her gone Mike was left to stew in his thoughts, feeling his cock twitch in his shorts as he laid back, double checking the men's sign for the sauna to confirm he hadn't accidentally fucked up. Still, what a nice show, Mike unable to help his arousal as the steam continued to hiss and dot his tanned body, committing her ass to memory, her toned core, a pang of... arousal? Jealousy? God he wanted her figure. Wait why would he want a girl's-

CRRNCH

The very odd thought seemed perfectly normal once his brow flattened, his eyes rolling upwards blood vessels burst, his irises dyed red as he gave a pleased grunt. More green beads dribbled from his cheeks as his panting, cracked lips shed their top layer for plusher growths below, his chin thinning as jowls melted to alluring contours. Of course he'd be envious, Mikasa was ripped. Most guys could never dream of being that in shape, so why not dream? The remaining few minutes were spent dreaming as Mike let his imagination flow, the heat massaging his thoughts as the susceptible man's subconscious played with the idea of gaining all of that, from the muscle to the thicker fatty bits, his nose twitching as he gave a satisfied sigh.

The shifts in his skull just didn't register, his subconscious already primed, his ears twitching as the tops extended, the tight fabric of his shorts rubbing against his cock nicely. He should have gone to a gym sooner, yet wasn't this always a part of his daily routine? He groaned feeling dizzy, his greasy hair heavier, the steam leeching the color as it paled to white. No he didn't work out before he was sure of that, but god did he have to pump some iron and make everything else pump. It'd be sooo good to work out every last-

FLLLP FLLLP

His ears unfolded upwards, the growing locks of white prickling over them as he moaned like the girl earlier, his head only clearing once his hips thrust upwards, something sticky quickly dissolving in the moisture, Mike ready to get in shape.

The gym was empty, likely because it was barely into the new year, though even the maid dressed instructors were nowhere to be found. He felt rather lost amidst the barrage of equipment everywhere. Yet despite this being his first time in a gym, there was a distinct feeling of Deja Vu, as if he was comfortable here, his heart thumping excitedly as his cock throbbed amongst the machinery. Without thinking he had stumbled towards a shoulder lift. It was a bit of an awkward fit as his over six foot frame had to crouch to get in a decent position.

Whoever had been using it before seemed to have set it to the weight limit, a voice in the back of Mike's head insisting you can bench that easily and given the warm optimism coursing through his veins, who was he to argue? Reality quickly asserted itself as he strained against the heavy machinery, grunting and struggling to even make it budge.

Keep going

He had to keep trying, something stubborn he didn't know he had inside insisting as veins bulged, his shoulders aching as he knew something wasn't right. His back muscles were tightening with each press, the weight slowly jostling up and down but barely lifting. It had to be his stance, the awkward gait making each attempt to straighten lose half its upwards support. Squatting lower he continued to press even as his muscles screamed, his shoulders trembling as bit by bit he raised up the heavy weights, everything tense as he lifted-

CRACK

KL-KLANG

"F-UHHHHNGHK!"

Mike collapsed, his muscles screaming as his spine popped under the weight, arching in one fluid pop as he writhed on the floor. The pain only masted for half a minute though, that searing burn in his muscles spasming as they knitted tighter, his wheezing gasps turning to aroused groans as the vertebrae collapsed, four inches arching inwards as the sweet burn of growing stronger radiated through him. It didn't quite show in his physique, the arch only accenting his pot belly more and the loss of height made his overweight bulges all the more squat and noticeable, and yet...

KEEP GOING

He didn't know why he was back under it so fast, the intense pain far outweighed by the blissful burn, his shoulders heaving at a much better angle as each flex shifted the bones. So much of the weight was coalescing at the small of his back, any significant raise soon followed by subtler pops, the metal clanging as he worked his height down, his shoulders slimmer as each scrunch followed that initial cycle of burning pain into orgasmic strength. His gym shorts were sticky, pre cum and sweat dampening it as his lifts became more frequent, his diminishing height making it so much easier to lift as he did one set of ten, then another. Soon he had shrunken down to the bottom reaches of five feet, a manic smile on his cheeks as he could really feel the burn, muscles slowly rippling into shape along the back of his spine, the rough scrape of the lift pads like sandpaper scraping away any roughness to his shoulders, leaving him an awkward mix of bulging fat and muscle as he finished his tenth set.

He was utterly exhausted, ready to KEEP GOING do some cardio as the ache and tear of his muscles triggered excess dopamine to flow, his red eyes fluttering as his cock stiffened further. Yeah he had barely even started his daily routine and all the treadmills had wide screens in front playing random episodes of anime. As soon as he stepped on one, the screen buffered, an MHA montage playing seemingly of all the Mirko clips in the show. Was it cause of the glass he had picked? Mike wanted to switch but there was something hypnotizing about the constant barrage of Mirko in front of him, his legs moving thoughtlessly as the treadmill gradually picked up speed.

The bunny ears continued to grow the more he watched, clips feeling more like memories as his tanned body gleamed with sweat. The more he paced the more fat burned, not much but the pace was far faster than natural, moobs and pot belly both jiggling up and down as they firmed up. He was drooling at the screen, his sweat dampened nips gradually hardening as the speed reached a point where he was lightly jogging. Up and down his fat bounced, receding bit by bit, the loose flab tightening as his skin slowly shaped it into perked rises, his legs trembling as every increase in speed forced them to tone.

He wasn't even aware he was cumming as his thighs brushed past his cock repeatedly, moans climbing to the husky voice on screen, his body desperately trying to approach her, subconscious inundated with thoughts of nothing but her as his pace hastened to a jog. Thick areoles bounced atop flattening mounds, so much fat condensing into a layer of muscle underneath, his speed hastening to almost olympiad speeds as his battered cock unloaded more of his burning fat. His legs kept bulging, sheafs of muscle pressing against thin calves, floppy thighs slick with sweat and cum as they continually juiced his balls. The burn was addictive, long white hair billowing behind as he kept going, urged to go faster, get stronger, become Mirk-

"OHHHHHHHHH~!"

This time the orgasm punched into his stomach, the treadmill slowing as half his former gut had either burnt away or erupted onto the tracks, all of it hissing as it cleared into little more than shed effort. Mirke felt incredible, petite a cups trembling with every step, his former keg of a stomach still bulging enough to block his cock from view when he looked down, giving a please gasp as the burn between his thighs condensed it in an inch. He was feeling more than just the burn, the soreness and afterglow addictive now, his brain chemistry already rewritten to keep on going and going and going and-

Even with his cock rock hard and brain lusting, he wanted to do something with a bit more control, setting his own pace since half the max settings here didn’t do much for her current- His eyes locked onto an ab workout station, one of those standing ones where you could easily lift and tone your core without lying on the well used ground of a public gym. The arch of his back fit nicely on the rounded cushion, hands gripping the handlebars at the side as he slowly curled upwards. His pot belly resisted, the bound up fat awkwardly bunching as each repetitive lift stretched it, his pert nipples throbbing as the solid mass began to-

“AHHHHHHN Ahhhh ahhh fuck…”

More cum squirted out as his chest rose, the successful crunch siphoning off the edges of his pot belly upwards, ramming under his nipples as the slivers continued to worm their way under his growing chest. There was no thought of sets or goals, just pure need to keep feeling the burn, his following reps shifting between intense sharp lifts and slow, torturous rises. Both had their uses, the shifting man breaking down his pot belly and pounding it into submission as lumps of fat squeezed into burgeoning abs, the sweat tickling his thick nipples as testosterone continued to leak out his pores.

Soon he was touching elbows to opposite knees, adding in a twist motion as his sides squeezed inwards, burning pleasure making his bare chest jiggle as its heft rose rep by rep, an especially large release spewing out as his c cup tits became large enough to squeeze themselves together whenever he started another crunch. Exercise was becoming like masturbation to him, not a hint of shame in his husky squeals, each violent lift an attack on who he had been, that sedentary lifestyle burning away as the jiggles of his breasts began to overtake his belly. Harsh breaths accompanied a hastening pace, lines digging into the remaining flab as Mirke jabbed his raised elbows into the disgusting fat, screaming with each thwack as fat condensed into muscle, his core taut as his breasts rippled out beyond D cup.

“HFF HFF NNGH JUST! AAAA! FEW! GRAAAAAAAAH~!”

A series of meaty pops followed as Mirke’s six pack formed, the thick curves of his waist accenting the muscular rises as steely abs glistened under a mix of cum and sweat, but the true bliss came from his final surge of tit growth, Mirke left spasming on the ab machine as muscle and fat pounded them into truly massive tits. It was like their own set of pumps, feeling like an invisible lover was groping him, pushing and pulling, jostling the meaty weights as his orgasmic thrashes finished toning the last of his muscled core.

Even Mirke was starting to feel a bit tired after all that, muscles aching, body trembling from an unknown amount of reps and exercise. Perfect for some endurance training. Can’t slack just cause you’re tired. Whatever small worries his former self had about lying on a matted floor had long since faded under the exercise addict he was becoming, laying on the ground and getting into plank position. He quickly realized he’d have to do it more in a half push up style once his tits smashed against the floor, his tightly bound cock leaking down his abs as he had to raise up everything to an even more strenuous position. Perfect challenge for her.

From there it became a simple waiting game, usually planks measured in a minute, but Mirke had no time limit in mind beyond resisting till collapse. He tensed up everything to keep proper posture, including his cock, the constant stream of orgasms leaving it pink and raw while his balls tensed near the base, a throbbing pressure sticking it to his upraised ass. By the first minute sweat was trickling down, then pouring by minute two, his legs shedding any remaining flab, his ass flattening, every inch soaked as the muscular strain built everywhere, but especially between his thighs. As muscle tore and snapped, his balls found more give, ever so slowly sinking inwards, filling the gaps as thinner spurts pooled down his abs and onto his barely upraised breasts.

FLLP

“OOOOOH OOoooh mmgh…”

He didn’t know it but the last of his male spunk had just released, one ball popping inside, then the other, his form quaking as new muscles formed, massaging his balls into ovaries as they pulled up. Speaking of pulled up the green speckled bits in his final male orgasm were also getting to work, fluids wrapping around his chest, threading together as they pulled against his tits, forming a grey sports bra that supported his chest the best it could. The wet fabric added a new dimension of teasing, his nipples rubbing against with every weakening shake of his form, yet he kept going as he crossed the four minute mark, gasping as the tension in his cock began to break it down.

“K-HEEEEEEEP GOOOOOOIIIIIING! NAAHHHHHT DUHHHHHHN~ Y-YEHHHHHHHHT~!”

It was the most strenuous, glorious burn he’d ever felt, his entire body on the verge of a massive orgasm as the tip of his cock slipped under his spandex, unable to handle the tension as every few seconds caused another centimeter to break down, collapse and add texture to his deepening slit. It was a constant cycle, testing every limit he had, even his cries unable to decide if they were horny or hurting, his cock one aching bruise, the ultimate charlie horse working itself looser and looser as it pulled into his snatch. At six minutes it was barely even a nub, the tight entrance to his slit pulsing against the bulbous tip of what used to be a cock, squeezing it like a stress ball as her tip sealed shut. Everything was burning, no release possible, Mirke moaning as the stress built inside. He was so c-close to something tremendous. He could feel it in every inch of his toned musculature, just ten more seconds, thirty, k-keep pushing his-

POP

“FUCK FUUUUCK OOH Ohh ohh fuck that was good…”

Mirko didn’t even realize she’d came, collapsing to the floor as her new pussy erupted out the last of her former self, her body nearly complete as she took a quick breather and pulled out an electrolyte mix from a members only cooler inside. She was unsteady on her feet, her legs like jelly, the tonage not bad on them but there was something missing, something that could only be fixed with more exercise.

While she eyed her options, she finally wasn’t alone as some scrawny dweeb stumbled in, equally in a daze as his nips poked through a black tank top alongside his cock. Mirko had to hold herself back from getting banned from the gym, her libido in overdrive but she knew just how to work off all that excess energy. The thigh press was modern, made to where you could adjust the weight limit while you were using it and avoiding the annoying on and off again monotony of finding her preferred lift ceiling every few reps. Normally she’d just set it to max but her legs needed a bit of a warm up after the running and planking. The first few squeezes were shaky, her usual positioning feeling off as if her legs were stunted, a few sets loosening up the muscle and bone as her legs gradually lengthened to a comfortable, natural feeling spot.

Slowly she increased her reps, urged on by the unsubtle moaning coming from across the room, that other member clearly enjoying it as much as she was as her thighs clenched and squeezed, thickening by the rep. She felt it all along her legs as she increased the limit, feeling her glutes clench and tremble, her ass billowing out as she imagined it was that moaning wimp between her thighs, keeping her own moans interrupted with her breathing to not be as obvious as her thighs worked themselves into massive trunks of muscle and toned fat. Even at max she couldn’t work off the edge, the other… guy? Girl? Whatever they were they were howling like an animal in heat, Mirko’s own lust bubbling up like her ass, her shorts soaked as she finished her rep and turned towards the… was that really the same person?

Her head felt fuzzy for a second, the reedy wimp who had first entered now taller and thicker all over, especially with their flopping pecs halfway to being tits as they moaned about being a princess or something. So many horny thoughts filled her head at that moment, Mirko moaning as her ass shook, pressure erupting into a bunny tail as she imagined domming them into submission if they’d be down… And their eyes were checking her out, Mirko grinning as she flaunted her finished bod, ready for a post workout snack.

“You, me. Showers. Now…”

Mirko didn’t know why she was so horny, her whole body craving stimulation, all of her new muscles hungry for a proper full body workout as she dragged her soon to be workout partner to the showers. Mirko didn’t seem to notice the burgeoning breasts as she stripped them, only needing two fingers to take care of the throbbing muscle between her legs as she stood over her newly finished girl.

“Don’t tell me you’re done already. That was just the warm up.”

Mirko smiled at the fire filling her partner’s eyes as the two muscled girls turned the showers on, both sure to recommend this place to as many people as they could, not quite remembering their original resolutions going in, but both feeling very satisfied as they put their new bodies to work.