Everyone is Tomo-Chan(Mass Twinning)

Kousuke Misaki was in a bit of a daze, the finals period always taking a lot out of his focus when combined with karate practice and it wouldn't do well to miss out on any days. He was already rather effeminate and it would take a lot of work to his his ideal even if he was rather out of it. It was while yawning and throwing on a gi over his normal clothes that he went to get some practice in before realizing rather quickly from the pictures strewn on the locker wall that he had just accidentally put on Tomo's uniform.

It was embarrassing to realize the gi was a bit roomy given it was his kouhai's, his female kouhai's though she really had to be more aware of her gender sometimes. She couldn't exactly practice in the female Karate club due to her strength and she was incredibly strong which Misaki admired, but sometimes it was hard not to stare when she changed, wishing that Jun'd see her with that flustered awareness that she was a-

"H-Huuuh~?'

The gi suddenly tightened, Misaki groaning as it put tremendous pressure on his waist, the already awkward realization he was wearing women's clothing made worse as it actively began grinding and rubbing through his uniform. He tried pulling at it only to find the chest of it sticky, a confused groan following as the folds almost pinched around his nipples, each yank tugging at his chest, sensitivity spiking with each jerk.

"I-I c-haaan't be seen w-heearing~ nngh! HAA! O-Ohhh~?"

Soon his tearing had turned to rhythmic grinding, Misaki squirming as he realized he was rock hard, both below and strangely above in two needy, burning points, the burning pink color of his new nips visible even through two layers of starched whiteness. There had been enough jokes in locker rooms towards his effeminate appearance before, but somehow that teasing had become a reality, Misaki giving one a confused poke before whimpering in confused bliss.

CRNNCH

• "Haa ahh wh-what is hahhppening to me? F-Feel... Hehhhlp~?" The finger that had poked dislocated itself before popping back in, the nail longer, finger slimmer yet more callused, throbbing as muscle and slimness spread through the rest of his jerking hand. Despite that roughness it was smoother too, no hairs to marr it, his grip strength increasing as what was meant to be an exploratory poke turned into a heated grinding, his nails a bit less well maintained but subtly longer as a jagged crescent dug into his chest.

He felt so hot, the gi squeezing around his waist and seemingly pulling in opposite directions, Misaki slamming against a locker for balance as his spine ached as it was shoved forwards. Each painful stretch demanded an opposing shock of pleasure, his other hand soon joining in groping his pinched pecs, a layer of muscle swelling underneath to make them look swollen like an overdone bodybuilder whose testosterone had just gotten switched with estrogen.

It was getting harder to think, flashes of Tomo rushing through his head, the gi getting rougher with its treatment as the force of its shifts turned to hard strikes against his core, driving the breath out in gasped blissful grunts. Each one shuddered through his soft exterior, muscle bunching tighter, curvier, his boxers growing damp as his vertebrae slowly arched. Something snapped besides his spine, his cum slickened boxers beginning to squeeze as the releases made them turn shiny and stretchy. He was suddenly feeling pissed off, more energy pounding into his core as it compressed, the lack of oxygen from the repeated strikes to his diaphragm letting the instinctual edge of his conscious take hold as he tore at his gi and the nipples beneath.

"Uhhhgnh g-gotta get this freaking crap offaaaaa~ m-heee~!"

A bit of a rougher tone seeped into his grunts, his palms shrinking as his new grip strength struggled to tear it off, his arms feeling like limp noodles compared to the strength building everywhere else. That feeling of shameful inferiority was sparking up, a subconscious part of him urging the tanner skin spreading down his arms to move faster, his hips grinding against a locker as more of that orgasmic compression rolled up his arms, muscles swelling all while sensual fat nicely accented that strength with feminine appeal. His core continued to shrink, all the while the arcing shape of his spine somehow gained a few centimeters as more weakness spilled out his cock.

Each tug was stronger, more and more of the gi peeling off as pleasurable surges of fat squirmed under his nipples, the soft flesh radiating from each tender weak spot as Omisak was desperate not to get any manlier. Or wait no she was trying to be like Jun! Jun? Mmm~ why was he suddenly so cute and sexy and nnnngh yeah gotta show h-him how much her figure had-

BLSSH

"OHHH FUUUUUUUUUUUUCK~!"

Omisa felt his balls suddenly pucker and thrust, something soft and thick pumping into his chest as his shoulders scrunched, the curses grunting out naturally as tufts of red overtook his blonde hair. Like everything else it was softer yet coarse, not as much product or care as Omisa's richly maintained bangs, some hair care knowledge crowded out by fighting techniques as his arms ripped the gi in two with a loud, victory screech. 

"Hfff nngh ahh~ what'd that shit doooo to me? I-Is this one of Gundou's p-pranks?"

Memories were blurring, practices shifting viewpoints, the dojo taking up more of his mental space as he peeled up the sweat stuck uniform, moaning as his pecs continued to bloat.

"Uhhngh I'm barely a man now. M-Maybe Jun'll finally see me as a wom-AHHH AHHHHHN~!"

His body responded to the thought, Tomisa squealing as his spats plastered groin was suddenly thrust into, his toned waist getting easier to hug as his chest sagged from the thick tit flesh flopping under his too tight uniform, ripping open five buttons with their sudden growth. But they weren't big enough.

"N-Nooo I'm not AHHH~ m-maaaan~! Ahh s-see meee..."

The bicycle shorts were relentlessly pressing between his balls, slowly churning his insides as his pupils began to darken, the color turning a vibrant scarlet as he tore off the tie and overcoat, the sweat soaked dress top turning gray as fantasies of Jun being the one pleasuring him below became more prominent.

"S-Stahhhp g-gotta remehhhmber CarOH OHHH~ JUUUUUN~!"

The folds of his brain were getting a strong workout, tearing like muscle fiber as he slammed his head back against the lockers, his hips following as fat began to spread inside his thickening buttocks, his eyes widening as he squealed his fantasy's name. Admiration became something much naughtier as his manhood was juiced for every last drop, each thrust prodding and pounding at the desire to even hold on as a harsh kick sent his testes bursting inside, his tits spilling past even E cups as Tomia came.

"Ahhh h-haaarder Jun H-AHHHHRDER~!" 

A bit of a snaggletooth formed as he moaned, lips plumping, his effeminate features becoming a different shade of androgynous that leaned female as crimson locks spilled past his chin. It was a conflicting mess of emotions and sensations, firm, muscular strength pounding his masculine form curvy while plush, sensitive fat sent waves of weakening pleasure all of it building behind his cock as the muscles began to spread.

"W-Wait n-AHHHT my GAHH p-prehhhcious f-flowERGH?!"

Tomi tugged at his bicycle shorts, trying to stop the latex from pressing against his cock, the base firmly slotted into a throbbing hungry slit as muscular as his new core as the world's most orgasmic muscle tear began to pull his cock apart from every direction as a desperate need to be a woman pounded into her shuddering form.

Even with the last of her clothes torn off, Tomi couldn't stop it, the sight of a cock between her muscular thighs a nightmare, waves of horror making the pain worth it as it began to squeeze.

"NNGH!"

It thrust, an inch swallowed as the muscle didn't just fuck her but squirm even deeper, plowing into her prostate as her hips fully spread. The sucked inch thust deep into her stomach, bulging against the skin as an ab as each squeeze of her core became stronger, Tomi drunk off pleasure, off the assured feeling that she wouldn't be seen as a man if she went further, harder, all the way for Juuuun~!

"AHHNGH! GAAAWD! OOOH OOOH! Y-YESSSS~! OH FUUUUUUH-"

Each inch made her scream and curse as it was dragged into her pussy, the entire shaft squeezing itself tighter and tighter as her own cockmeat compressed her tip into a clit, the bulging abs making her abdominal crunches suck harder and faster as cum squirted out her hollowed out stub, fat spreading into her strengthened thighs as she clapped them together.

"I-IIIIIII~"

The shaft popped, a thin sheaf of flesh still dangling out as clear spurts spread to her squirming toes, her unsure grip getting firmer as strength coursed through the remaining pieces of her shifting form.

"AHHHHHHHM~"

Muscle clamped onto her deformed prostate, her innards chewing it to pulp before clamping and pulling a few reps, forcing it to spread into a burning womb. 

"AAAAAAAA~"

Even the sheath sucked in, spreading into thick, powerful labia as the last of her former memories were lost under a deluge of Tomo, womanly sensations and pleasures filling her to the brim as she squealed out what she knew she was, what she had always been.

"GIIIIIIIIIIIIIIIIIIIIIIRRRRRRRL~!"

Tomo shuddered as one last orgasm ran through her, gasping as she sank to the cold locker room floor, barely feeling it as the fantasy and feeling of being fucked and dominated was still fresh on her mind. It had felt so good to be on the receiving end, yet her fantasy wasn't fully satisfied, Tomo looking at herself in the mirror, thankful no one was coming to the dojo while finals were-

"Hey I got your letter? Everything okay?"

Her heart suddenly raced, Jun's voice echoing as her nakedness sent her into a panic. Thankfully she still had a spare gi but she had to get out before Jun... before... The heat surged between her thighs, the fantasy replaying as she swore she could feel something thrust between her thighs, fight or flight finding a third, more perverted option to go with as she pounced on her crush, tired of waiting.

"Who the he- Tom-OHHH~?!"

Dammit she wanted him to be on top, too horny to really think as she began to hump him, her lack of anything obvious as she soon felt a nice lump of muscle stiffening against her dripping slit.

"Mmm~ I can't hold back any more Jun! I-I'm a woman!"

As if to accent it she thrust, not noticing Jun's uniform pants beginning to dissolve where her fluids touched, spandex forming over his bulge as she desperately flung herself at her stunlocked friend.

She had to prove her femininity, feeling like it was overflowing as she smothered his face in her tits, missing the odd crunchy sounds as she peppered his brow in kisses that spread rosier color to his skin as shoots of red sprouted down his forehead. The love really was overflowing, her lips awkwardly grinding against a cock sticking further out once his pants erupted into a skirt, Jun's cock swaddled in her awkward attempts at lovemaking as his exposed thighs began to swell against Tomo's hungry humping.

The arousal was just too much to think through, Tomo barely noticing the changes to Jun's face as she pulled his head out from between her tits, one eye red and trembling, one cheek soft and a quarter lip bulging awkwardly against the rest. None of that mattered, Jun's lips hoovered into Tomo's as the initially resistant groans turned to pleased grunts as something slithered between his thighs, Tomo's overflowing femininity making his cock feel like it was melting as each buck found less sticking out against what was now a girl's uniform.

He was being completely dominated, Jun's promise playing in his head, that feeling like he had to overcome Tomo to prove... to prove? There was a wet pop as one of his testicles sunk, an indescribable pleasure swelling out as butterflies fluttered inside the most private of spots, Tomo's rough tugging of his hair spreading two nice pullable front tails as a matching pair of puffy nipples began to press against Tomo's. Tomo was so strong, so sexy, so much better wasn't she?

POP

There went the other, Tomo and Junmo moaning as plump lips rubbed together, less and less thrusting going on as their legs were tangled and squeezed, more a sensual grinding as Jonmo's chest swelled, any attempt to remember who he was just turning him on as even his own name felt more like a dirty fantasy yes finally someone strong enough to push her down and make her feel like a-

SCHLICK

From afar Gundou watched with a vague look of amusement through binoculars, glad that one of her plans had finally worked. She didn't like how obsessed Tomo had been, trying to change herself for others rather than understanding her own appeal. Judging from the two Tomo's grappling on the floor as their moans turned from Jun to themself, it seemed like her plan to boost Tomo's self esteem was a massive success. Or at least would be when they got home. She wasn't actually sure if the first one had been Tomo when they stepped in but she didn't really care. As long as all the Tomo's were happy she'd be happy.

It helped that she had finally gotten back at Jun after years of finding that hunky man- Gundou paused, fishing up the twinning solution she had gone to great lengths to find only to see that maybe keeping a glass bottle in your pockets wasn't the smartest idea when you were lying face down on rocks, a small crack in it leaving the edges moist, Gundmo shivering as it suddenly felt like every fold of her pussy was being worked out as she moaned out Jun's name, then Tomo's.

Regardless of how things turned out, the one indisputable fact was obvious. Tomo-Chan wasn't a girl, she was a bunch of girls, and more would follow as the horny Tomo's began to prowl around the school grounds, hoping to find the one guy that would be strong enough to resist turning into them...