"I hate P.E."

Yui is panting already, unable to keep up with Class 1-A as they pound out the laps around the gym facility. They've already been training for a while now, and she was in jail only three weeks ago. Sure, she tried to keep herself fit by doing pushups and such, but there is only so much you can do in such a confined and regulated space. Plus, Yui isn't the type to be able to continuously push herself without external aid.

Sweat beads at her forehead as she lags behind with only Minoru Mineta for company. She hisses as she tries to shake him off, hopping on one leg as she struggles to peel him off her other leg. He has stuck purple balls and is clinging on for dear life, wailing like the little brat he is. Even the stupid tracking cuffs are less clingy that he.

"Fuck..." she curses as she flails about, "get off me!" She spares a quick glance at the other side of the gym where the fittest are easily pumping it out- Midoriya, Todoroki, Bakugou, and more. Iida is already on his fifth lap- Yui had just started her second.

"Fucking weak ass, trick ass loser!" Bakugou shrieks as he jogs past her, a terrifying grin etched onto his gremlin face.

"Suck my dick, pop rocks!" She shrieks back. Her eternal scowl deepens with every person who passes her.

"Fuck you!" Bakugou howls.

"You can do it!" Midoriya says encouragingly, his calves pumping past her and she groans. Yui looks like a stick. Her noodle arms and legs are obviously not pro-hero material. The only halfway-decent combat move she can do is an axe kick, and she's never had to use it seriously before, not even in jail (there is a very rigid hierarchy, and Yui is near the top thanks to her good relations with an assortment of criminal figures). She mostly relies on guns, sneak attacks, and a lot of bluffs.

The black haired girl gives a long groan of relief as she finally peels Mineta off, throwing him to the side harshly like a child throwing their teddy bear in a tantrum. She straightens up and continues slow jogging. At this rate, she'll die before finding out who the mole is.

"Time's up!" Comes All Might's cheery voice. Everyone slumps to the ground at the same time. "Some people need to work on their fitness a bit more," his bright, gleaming smile seems to mock Yui. She scowls. It doesn't take a genius to know that the rest of the class, who are all supremely fit and well on their way to becoming a hero, are all questioning her abilities to some extent. However, some are better hiding this thought than others.

"Don't be disheartened, Yamasaki-san!" Midoriya gives another encouraging smile, "you'll get better really soon!" Her eyebrows twitch. She understands that he is only trying to be nice, but it is really grating on her nerves.

She tries to smile but ends up grimacing. "Yeah, sure."

"If you're so weak, then why the fuck are you here?" Ah, there's the confrontation she was expecting of Bakugou. An awkward silence ensues as everyone quietens.

A shark-toothed redhead breaks the silence, hissing quietly, "that's not very manly, Bakubro", as Yui turns to face him. Her gunmetal grey hues stare down Bakugou's striking red ones, utterly unflinching and unforgiving. She knows that if it came to a physical fight, Bakugou could literally kill her at a leisurely pace, and she wouldn't be able to do a single thing. However, she isn't going to back down from a little spat.

"Aren't you gonna say something, miss yakuza?" The smile he has on his face is not friendly at all. "Are you gonna cry and grovel like that fucking Deku?"

She has no idea who this Deku is.

"Aren't you a little too old for bullying, Pop Rock?" She teases, lighthearted in tone but her face is stony. Yui is still unsure of how to play her cards here. Go for the nice facade? Terrorise him? She's treading on uncharted waters.

"Stop this immediately! It is unbecoming of aspiring heroes!" Iida pushes the two of them apart but they both ignore him, sidestepping the choppy boy before facing each other again.

"Aren't you a little too fucking weak to be here?"

"Aren't you a little too villainous to be here?"

"Look at the fucking mirror, Yakuza. You don't belong here when you look like a middle schooler's maths book."

Yui hisses and takes striding steps closer until they're almost nose to nose. They glare at each other, neither willing to back down for the sake of their pride. She lowers her eyes intimidatingly and sneers, while Bakugou's hand begins to spark with small explosions.

"Oi, Bakubro, let's just leave it," The sharky redhead slides an arm around his shoulders with an uneasy grin. "Sorry about him, Yamasaki," he offers an apologetic smile, "he's a bit of a handful."

"Get off me, shitty hair." The angry teen pushes the redhead's arm off his shoulders and storms away, a scowl so deep it could rival Yui's. The redhead calls out, halfheartedly, before slumping and turning back to her. He bows.

"Hi, I'm Kirishima Eijirou. I'm really sorry about Bakugou, again."

"Don't worry," she waves his apology off, "I'm Yamasaki Yui. But you probably already know that." A grin settles on her face as she watches the blond scream something incoherent at Midoriya. Fuck finding the mole, she's made it her sole purpose in life to annoy the stupid explody boy.

Kirishima notices her malicious smile and awkwardly floats away after Bakugou, unsure of just how sketchy this new character is. Calling a fellow hero-in-training a villain right off the bat is a bit much, he thinks, but who is he to judge? Maybe she'll soften up if he get to know her. Kirishima casts her one last glance before pushing it out of his mind. He has bigger problems to attend to, the most imminent one being Bakugou and his tantrums.

The class continues. Yui is surprisingly adept in flexibility, but she gets outshone by Asui in all her froggy glory.

"You're so cool," she admires Asui, a small tone of jealousy. Asui doesn't pick up on that, only responding  with a cute, startled "kero?" and hastily follows it up with, "no, that would be you, Yamasaki-san." Yui immediately feels guilty and prompts a smile onto her face.

"Help me stretch, Asui." The two help each other, loosening their limbs after a tiring cardio session. Even with stretching, Yui knows that all her muscles are going to be too sore tomorrow and she reminds herself to get a tennis ball to help her get all the muscle knots out. "Man, U.A. is intense," she complains. The frog girl shrugs as the tattooed one gets up, dusting herself off.

"It's necessary to become a good hero, kero."

"Hmm." Her eyes light up when she sees Bakugou walking, hands shoved into pockets. "I'll be back," she hastily tells Asui before approaching him casually, eyes in the sky as she pretends to not see him. She times it well. As they near, she shifts her direction slightly and purposefully shoulders him as they walk past each other. There is an immediate reaction.

"Do you wanna go?!" He snarls, explosions popping in his palm. She holds her hands up in mock surrender.

"Chill, Pop Rocks. I just ran into you, okay?" A small smirk tweaks at the corner of her lips.

"Shut up. Your voice is irritating." He spins on his heel and continues stomping on his way to join up with his friends, deciding that she wasn't worth the effort. She glances down. Yui gives it about thirty seconds to a minute before someone notices.

"What was that?" Asui asks as she sits back down with her new froggy friend.

"Oh, nothing much. Oh, Asui, tell me about your quirk."

They chat for a little, and she finds out that Asui really is a heaven-sent gift. She smiles a little; the differences between the froggy girl and her are drastic enough to be amusing. It's quite easy to tell that she is pretty passionate about hero work, and Yui can't help but silently root for her.

"Of course your favourite colour is green. I mean, look at you," she coos, gripping Asui's cheeks and pulling.

"Yamasaki-san, please stop." Asui is met with lighthearted laughter, but their attention is diverted when Kirishima yelps in surprise.

"Hm?" they turn to look up, noticing the redhead with lightning boy Kaminari and Bakugou.

"Uh, Bakubro, are you wearing any boxers?" Kirishima asks awkwardly, eyes flicking between Bakugou's eyes and his jewels. Bakugou gives him a dumbfounded look.

"What the fuck? Of course I am! What kind of shitty question is that?"

"Like, I mean, your dick is gonna pop out of the tracksuit real soon," Kaminari points out. They three all stare down at Bakugou's well endowed crotch area, where, sure enough, an awkward bulge that is supposed to be a packed circle turns out to be more of a cylindrical shape. "Nice of you to flaunt what you got, though!" Kaminari gives a thumbs up.

Yui snickers as Bakugou's face explodes into red, his hand hastily covering his crotch. Kirishima winces while Kaminari laughs at the explody boy's situation, causing a commotion that attracts other 1-A members.

"What the fuck? What the fuck? What the-"

"Don't look!" Yaoyorozu covers Ochako's eyes and averts her own gaze, while Ashido openly stares and points.

"Well shit!" she laughs as Jirou herself turns red and slaps the pink skinned girl. Jirou gets tackled in return.

"Who the fuck forgets to wear underpants in the first place?" the tape boy guffaws as he walks closer.

Yui waits for everyone's laughter to subside a little with a smile before she drops the bomb.

"Looking for these?" Yui catches everyone's attention as she waves around the dark green boxers Bakugou was wearing not long before. She twirls it around her finger, the other hand on her hip, and laughs obnoxiously. "Kinda small, don't you think?"

"How did you-" Bakugou stammers uncharacteristically, ears practically glowing red at this point. "Fucking give that back you whore!" He swipes for the boxers but she dances out of the way.

"Class?" All Might is completely ignored as the little charade continues.

"That's a little harsh, don't you think?" Yui smiles, unaffacted, as the tattoos on her face merge together and form a crude Kacchan iz a peen across her forehead. She even makes an accompanying gif of a stick figure with spiky hair sucking a dick.

"How did you-"

"Yessir Yamasaki!" Ashido cheers.

"It's my quirk," the tattooed girl grins. "Anything I touch I can seal away into some other dimension," she points to the tattoos on her face, "and the tattoos are visual representations."

"Class!" All Might finally booms. The poor teacher can feel a migraine coming on. Internally, he wonders why he has to waste precious time in this form just so Nezu's hired girl can antagonise young Bakugou. He can't see why the principal took an interest in her out of all people. Sure, there weren't many they could find in the first place, but Yamasaki Yui? Her maturity level is definitely of a hormonal fifteen year old brat, even if she doesn't recognise it herself. He pinches the bridge of his nose.

"Sorry, sir." A cheeky smile as she stays put while the rest of the class files off, giggling.

"Give his panties back."

"Pft. Panties." She hands them back without any complaints, satisfied as Bakugou swipes at them angrily. He's practically bursting at the seams; she'll probably have to watch her back if she doesn't want to die prematurely.

All Might heaves another sigh. "Young Yamasaki, Young Bakugou, please go rejoin the class."

"Watch your back, yakuza," Bakugou spits one last time before going off towards the bathrooms to put his boxers back on. Yui just smirks and prepares herself for an all-time prank war. She follows him for a few steps, that infuriating, teasing smile never leaving her face.

The teacher sighs again, but allows himself to relax. Perhaps everything will turn out alright. Nezu is extremely smart; Yui would not have been chosen for no reason, surely.

He flicks a glance at his beloved class, watching as the girl chats to Asui as they begin the second half of their lesson.

All Might smiles.

It seems that Yamasaki Yui is fitting right in.

-

unedited