The clock hand moves, signalling two minutes left of school.

Yui rubs the plain black cuffs around her wrists. They're flat in shape, slightly flexible but firm enough that it wouldn't snap. Honestly, she's surprised the heroes trust her that much. Only a tracking device? No quirk-repressing cuffs? It doesn't make sense. Not to mention how easily sweat can start to form underneath the bands. Unfortunately, only a Pro hero with the proper key can take it off, and that Pro hero is her decreed enemy, Aizawa.

The back of her eyes throb. She never knew how tiring school could be, but still, here is better than being cooped up in jail. Even if Aizawa is her homeroom teacher. She just lets out a tired sigh, already eager for this day to end.

"Fuck," she whispers quietly. Her pencil taps against her desk as she realises she has achieved nothing today. Although she's decided that bullying Katsuki will be her main focus, she still has to keep investigating the mole case, otherwise she won't be getting free Nuudles ramen. A modern tragedy.

It's going to be a bit hard considering she only recognises half the people in her class.

The bell rings and Yui nearly pees her pants in happiness. It's not that she hates UA, but she finds it a little stifling with many heroic dreams from heroic students with heroically buff arms.

Hastily stuffing all her stationery into her pencilcase, she tucks her folders under her arm and leaves immediately.

"Yamasaki-san? Yama-"

She pretends that she's deaf and continues to speed walk down the hallway as other students start filing out, going over the impressions people have left in her mind as she heads towards her locker. Yui easily remembers its location; her memory is sharp and unsurprisingly good with directions with all the experience she has navigating drug cartel bases and cramped, slum-like areas and alleyways. It's probably the only redeeming quality of her raisin brain.

Bakugou Katsuki. That's the first name that springs to mind. He's immediately on the suspicious-list with how villainous he is. Briefly, she ponders if that would actually be an excuse to cross him off as it makes him too obvious, but she's already decided that she doesn't like him, so she'd keep him on just for the sake of pettiness.

Asui Tsuyu. Cute girl, cute name. Nothing really suspicious, but nothing that would definitely cross her off. Uraraka Ochako. A sweet girl who makes Yui feel fluffy and at ease which immediately lands Uraraka on the suspicious list. Whether it's due to trust issues or not, she figures that a guilty-til-proven-innocent approach wouldn't hurt.

"Yamasaki?"

Yui reaches her locker, opening it and changes her shoes. She doesn't know much about anyone else. A few vague faces and names like Kirishima, Kaminari, Yaoyorozu. And that pretty boy with heterochromatic eyes Shōto. She frowns. There is something she can't put her finger on, something familiar about him, but she can't remember. No matter. She'll just do a background check and figure it out then.

"Yamasaki-san!" When she realises she can't ignore them anymore, she looks up and cracks a smile at Uraraka and Midoriya who walk towards her, both waving cutely.

"Hi," she says.

"Hey!" Uraraka greets and she flounces up, clasping her hands in front of her body. "Are you going to catch a train? We can walk to the station together!"

Yui blinks. "Uh, yeah, sure," but she quickly retracts her statement as she remembers that Aizawa has to escort her today. She's already getting too comfortable with living like a free citizen. "I'm sorry, actually, I forgot that I have stuff on."

"That's fine," replies the other girl. "Next time then!"

"Yeah, see ya."

"Bye, Yamasaki-san!" Midoriya chimes before the two walk away together, eyes crinkling into crescent moons at each other cutely while Yui's smile drops, staring at the browned haired girl in suspicion.

She closes her locker door and grabs her stuff before heading out to UA's entrance. The gates tower over her, letting out a rapidly dwindling stream of chattering students while she waits on the side.

"Everything is his fault." She kicks a pebble angrily at the thought of the underground hero. Now she has to loiter around and wait for him to escort her to her temporary home. She's already been there, but doesn't know the location of it yet as it was only a short visit by car while Nezu gave the detailed briefing of what to do and how this case will be run.

"Is it a habit to talk to yourself?" A slightly amused voice makes her lazily turn around. Yui eyes the boy with eyebags for days and messy purple hair. She remembers him from the cafeteria when her brain cells combusted and she forgot how to hold a civil conversation.

"Eyebags," she greets and he balks.

"Rude." He gives a slight inclination of his head in a nod. "It's Shinsou. Hitoshi."

"Yamasaki Yui," she replies with a small grin. She doesn't think that she's seen him in class 1-A, so she asks, "what class are you in?"

He blinks, his guard up. "1-C," he finally replies. Slightly defensive, she notes. "I haven't seen you before, what about you?"

"I just joined 1-A."

A raise of his eyebrow, and perhaps a little jealousy flashes across his face. Yui's grin drops when she noticed hostile undertones to his voice. "I see." He gives a curt nod, "bye," and walks off suddenly. Her trademark scowl makes another, more permanent appearance.

"Man, what's his problem?" She mutters. Most logical reasoning would be that General Education students have a vendetta against 1-A. Maybe he's bitter than he didn't get in, but that's not her problem.

While her mind sidetracks, Yui doesn't notice a certain half-and-half boy staring at her from a distance away, a frown creasing at his beautiful features. He turns away and leaves just as another person arrives at the scene.

"You're awfully eager to leave," comes the voice of the man she currently detests the most. She shrivels up and shudders before turning to face Aizawa, her home room teacher, and the love of her step mum's life.

"Anyone but you," she says flatly. "Even that bastard principal. I'd prefer his company over yours."

"Feelings mutual." Aizawa pinches the bridge of his nose, a faint sense of pity bubbling in his stomach. It is technically his fault that Yui is in this predicament, although he was expecting her to be more grateful because he singlehandedly saved her ass from spending more time in jail. Unlike his stoic and gruff facade, Aizawa Shōta is kind at heart. "How did your day go?"

"Don't talk to me."

"Don't be a brat. I'm not asking about how you feel. I want to know what you have discovered."

Aizawa really is kind, deep, deep, deep down under crusty and pessimistic layers of depression. No kindness to spare for a dumb girl, however. 

"I hate you, ya know." She grouchily adjusts her school bag, dragging her feet as she lags behind an equally irritated man with equally bad posture. "I still don't know most of them," she scowls."

"You really should have looked at their files first, Yui. Then you'd know all your classmates."

"Fuck you." She huffs. "You're their hometown teacher anyway. Shouldn't you know more about them than me?"

"I'll tell you on a need-to-know basis. And you haven't answered my question."

"Tch. I've got something that resembles a plan, I guess," she mumbles.

"You guess? You're here to find the mole. Don't half-ass this, twat."

"Shut up, let me explain!" She gives another huff before she remembers that she, in fact, does not have a good plan. Hastily she scrambles for something. "Uh, I can use my quirk to easily put listening devices into people's pockets or rooms, so if I find anyone suspicious, I'm gonna do that. Or I can bait them, like, I dunno, write villanz rock!!1! on a piece of paper and drop it in front of the suspect. Bottom line is, I need more time to find suspects."

"Then do your job."

"I am!"

Aizawa ignores her. He can already see that she'll be the cause of his rapid aging. Her half-assed plan is already causing him headaches, and he knows that he's probably not the only Pro hero to be second guessing the principal and his choice of Yamasaki Yui. When he asked the principal why he couldn't have been the one doing all the primary investigating, Nezu simply replied that Aizawa was already too biased. Logical, but why her, then? There is little comfort in knowing that an ex-villain slash vigilante will be the one to determine who the mole is. Apparently her struggle to form emotional connections would come in handy, but all he sees is a suspicious, stupid teen who can't get a grip.

Yui seems to catch onto what he's thinking despite half his face being hidden by his scarf. She'd have to agree only partially, because Yui, just like all other teens, develop egocentric views.

"You forget, I'm a criminal. That's why I can think like one." When she doesn't get another response, she puffs her cheeks angrily but opts to stay silent.

—

The walk back to her temporary home was very awkward and feels unnecessarily long. Yui grimaces and the thought of having to walk with Aizawa again.

"Stupid motherfucker," she mutters before cringing. It's possible that he has, indeed, fucked her mother. She doesn't want to think about that.

Yui sits at a small wooden desk in her plain bedroom. No decorations or anything. Aizawa has already checked that there are no loose floorboards or other places that she could potentially hide any weapons or tools in. Which doesn't make sense, because she can literally use her own body as storage. Nezu decreed that she was allowed to use her quirk, as long as a female Pro hero checks up with her daily to view the storage contents.

She stretches, swivelling in her chair to crack her back and eyeing the flimsy bedroom door with no lock. Behind that lies the stupid caterpillar, who is probably taking a nap on the kitchen floor. He's supposed to stay overnight, which makes Yui feel very uncomfortable, but she takes reassurance in the fact that she won't have to live with him every day. Apparently, there will be a rotation of Pro heroes or policemen until she has proven herself to them. Honestly, she can't understand why they put so much effort, resources and time into her. There is some sort of reason, but Yui hasn't figured out what it is yet.

She shakes her head and brushes a loose black strand out of her face. She won't achieve anything to worry about that stuff now. Instead, Yui takes a highlighter, peering down at the multitude of cream coloured files on her fellow classmates, placed neatly on the desk by someone else who probably was also the one to put the towel, blanket and pillows on her bed.

Yui grabs the files and flips through straight to Shōto. She wants to pinpoint why she feels that he's familiar, although she's pretty sure that she's remember such a pretty face if they have met before. Humming lowly, she peers at his stoic face, gaze settling on the scar over his right eye. Surprisingly, it only adds character, although Yui shudders at the thought of what could have caused it.

"Hm... Todoroki Shōto, age fifteen, height..." Her eyes bulges and she shrieks. "Fuck! Todoroki?! How could I have missed that?"

At her loud exclamation, Aizawa can be heard sprinting towards her in alarm, one leg awkwardly out of his sleeping back and the other leg still caught in it.

"Yui?" Aizawa opens her door, managing to not slam the door as he catches sight of the girl staring at the files in front of her. She turns to look at him, shock and annoyance in her gaze. The male straightens up, relaxing as he realised there is no threat.

"What?" He demands.

"I'm literally stupid." Yui swivels around and stares into the cold gaze of the heterochromatic boy who stares back from the paper.

"Todoroki Shōto. Son of Endeavour."

"And?"

She gives another indignant huff, pettiness and rivalry already beginning to settle in her veins. Todoroki Shōto is already making her angry, and he's not even here.

It would seem that Bakugou won't be the only target anymore.

Yui turns back around and meets Aizawa's dark, albeit slightly curious, gaze and parts her lip to speak.

"Endeavour was the one who arrested me."