A/N: I don't know why I wrote this. I'm sorry lol, enjoy

—-

His voice still resonated in your mind. His words, his shallow, hot breaths.

Yes senpai.

You had to snap out of it but you couldn't. Watching him stand in front of you, your own tie on his neck, all messed up by your own hand. His clear, glistering skin. You wanted to drown in his voice, breathe the air he breathed.

But he's a brat, nothing more. Just your student, and your roomate. And a boy two years younger.

Damn it.

No matter how many different excuses you could think of, you still couldn't help but keep staring at him. In that moment, just that moment, nothing else mattered. Not his age, not his annoyance, not the fact that his family was letting you live in their house. It all escaped your mind, and only dirty hot thoughts and images of the boy flooded it. You couldn't help but think of all the things you wanted to do with him, to him. Straps. Whips. Ropes. Screams and moans mixing together. Both of you a sweaty mess.

Well you're hella thirsty for a girl who's never even had a boyfriend.

You had to shrug it off, let it go. Those things were never going to happen. Never. He hates you anyway, you hate him too. Drop it. Stop acting like a child and start actually doing your job of teaching him and training him. Get his trust, not virginity damn it.

Oh god, he's a virgin. I am not going to be the first.

You grabbed his arm and led him out the class room, forgetting everyone there, everything that happened and everything you hoped would someday happen. You focused on getting him out the school, somewhere else, fresh air, where you could forget and move on.

You were so focused on focusing, that you didn't realize you were still tightly holding on the Katsuki's arm, and actually hurting him. Katsuki felt the pain, but he didn't care. There was no way he would tell you to let go.

You pulled away, rigid breaths finally taking over your usually rhythmic breathing. Your usually cold, observant eyes staring back at him with shock.

'Yes senpai'?! What the fuck!? Why would I say that, that's such a fucking stupid thing to say. I don't get flustered, that's a deku thing. But what the fuck?

He stared back at you in terror of what he's done, how it would change things. Even though you two weren't best buddies, he still liked you. As a person, he'd keep telling himself. He could watch you cook in the kitchen or do your homework in the study sometimes, you always looked to peaceful. So beautiful.

Shit, stop it.

Just a mentor, nothing more. Just a girl that's two years older than he is.

Despite all this, all the embarrassment you caused, YOU started, he still couldn't help but think... think what would've happened... if you two had been alone...

Would you have pulled him in for a kiss? A hot, gentle and passionate kids that he could melt into? Would you have ripped that stupid tie off, along with his shirt, him doing the same to you, buttons bouncing all over the floor? Could you slam him against the wall, or onto the desk, something, anything, to feel that rush of pain and adrenaline and... you? Your hands all over his body, exploring him before anyone else could, where he could be all yours, anything you wanted to do to him you could? Would that happen? Can it?

His muscles were all shaking from these thoughts, these images popping in his mind. Then, you grabbed his arm and started to led him away, of course he followed. He'd follow you anywhere. Right?

Like hell I would!

He didn't want to give you the pleasure of having control over him, but your grip was so tight he wasn't even sure if he could pull it off. Plus, the pain helped. The pain brought him down to Earth, back to reality where you hated him. Well, he hated you too, so there shouldn't be a problem. Your grip only tightened as you sped up, but even so he didn't even bother to try and get out of your hand.

He kept telling himself is was because he didn't want to be a coward, and he could take some well deserved pain from his mentor. But, in reality, feeling your skin on his, even painfully, was enough to put a small smile on that bratty face of his.

Back to dream world he goes.

You finally haunted to a stop outside, only then letting go. A huge red mark stained his normally perfect skin as he looked at it in wonderment. He wondered how he would look like with those marks all over him, all over you. His breath shook.

Fucking hell. Enough of this bullshit. He thought.

You stood across from him a few meters away. You finally pushed all those thoughts aside, trying to distract yourself with something else.

"Let's begin your training." You said those words harshly and coldly, treating him like the brat you knew him to be. Or at least, wanted him to be.

Bakugou noticed that, and scoffed while looking away from you. "Whatever."

"Since today's our first training session," you say, trying to sound professional after what had happened. Really? Hitting on some kid? Maybe he's right, maybe you are that desperate. Just forget about it. "I want to focus on fighting someone who's quirk is unknown."

"Huh?" Bakugo says, making eye contact with you.

"Here, I'll simplify it. Beat me and you can go home." You said with a sly smirk.

Bakugou scoffed again. "Yeah, sure, seems easy enough. Just don't complain to me when you've got a black eye the size of my fist."

You smiled. Oh, how much you loved it when people underestimated you.

Victory always tasted sweeter.

"Bring it."

Bakugou lunges at you, his hands starting to use his quirk as small explosions happen on his palm. He's running, screaming, and you're not moving an inch. He's getting much closer, explosions getting larger and more dangerous.

Just a few feet away.

Almost there.

A loud scream as he forces his hand onto you, the largest explosion going off.

I think I'll use Hikaru's power right now.

He starts breathing heavily on the ground behind you before smiling. He turns around, a huge shit-eating grin on his face.

"Now then, can I leave ye-"

Barely a sound, barely a feeling, barely a second. But Bakugou knows something's wrong. He stops talking and his heart skips a beat.

You stand behind him, your mouth close to his ear. "You should never underestimate your opponent."

He sharply turns his body around to face you, his hand already coming at your face. He doesn't even see you move away, you're just gone. And just like before, you're right behind him.

"What the hell is your quirk anyway? Super speed? Teleportation or some shit?" Bakugo screams, continuing to swing and turn towards you as you keep dodging him.

"You really think that if you encounter a villain with an unknown quirk he's going to straight up tell you what it is off the bat? Why, 'cuz you'll whine a little?"

He screamed in response and swung harder, but he still missed you. There was no way he could land a hit on you with a quirk like yours.

"Stop trying to solve everything with brutal force. Use that big brain of yours, dumbass."

"How are you calling me smart and stupid at the same time!?" He screams out. Looking for you as you keep changing locations all around him without a break. He's caught in the eye of the storm, your after images circling all around him.

"Shut up and do what I say! Think, what can you do?"

You keep circling around him and he keeps trying to catch a glimpse, until finally, he sits down, eyes closed and legs crossed. You're wondering what he's planning, then before even you can see it, he kicks his leg out, and you trip right over it. He jumps up and pins you down to the ground, holding you tightly by the wrists. You keep moving around trying to get out of his grip but he won't let you. Now he's just watching you struggle.

A sneaky smile comes on his face when he realized what a wonderful position you are in. Under him, powerless, completely under his control.

Unfortunately for you, that smile was one of the hottest things you've ever seen. You feel your face start to heat up and your nerves shake. You can't focus right now, you can't think.

Shit. Shit. Shit. I cant focus, I need to focus, my whole fucking quirk depends on focusing. If I won't pull my shit together I'm gonna lose to this brat. I cant have that, not on my shoulders or as my reputation. Some pro-hero, loses to a 15 year old kid. It's just embarrassing.

Katsuki sees your struggle and lowers his face to be only a few inches away from yours. You can see what he's doing, distracting you so you can't think straight or remember or focus on anything important.

"Stop telling me what to do." He whispers, staring into your eyes from his elevated position. A rush of blood in your body leaves you light-headed. You really can't think straight. You can't think of anything useful, a strategy, a memory. All you can think about is how badly you want to rip all the clothes off that boy and punish him for talking back to you. Where you'd touch him, his moans and wails mixing together to make a beautiful song. Using all kinds of tools on him... And maybe he could even break out of them, regain control, just like he did now...

Is he using... MY seduction technique?

That thought wakes you and puts you back out onto the battle field. You can finally focus and remember. Remember what's important.

I'll use Kagami's.

Without wasting another second, you rise from his grip and stand over him. Physically - rise. Your body becomes transparent and you sit up after going through Bakugo's body, through his grip.

"Not bad kid, I guess it'll do. But, you should always be prepared for some kind of ace up your enemy's sleeve."

Bakugo turns to face you, clutching his chest with a terrified expression. "What- but you- you were just-"

"Wow, you sound just like that broccoli boy!"

Bakugo stands up to face you, clenched fists at his sides. "Did you just come through me?!"

God, I wish.

No, stop it. Don't think like that. That's disgusting.

"And, what's your point?" you say, not really thinking about it.

"What the hell kind of quirk do you have anyway?! Some kind of, fucking, fast ghost or something?!"

You watch his confusion and smile at his craving to figure you out.

"Why should I tell you the biggest ace up my sleeve?"

Bakugou stands in front of you, his fists finally relaxing. His nerves finally looked like they've calmed down. "Shouldn't a student trust their mentor?"

Despite how much you wanted to keep this a secret on the downlow, you knew he was right. Your classmates and teachers know about your quirk, but everyone was asked to keep the information private until everyone was ready to find out your true identity: the board was scared that having an actual pro-hero just studying in UA would cause ridicule from the media, and just creating rumours and other lies about why you were there and ruining the school's reputation.

"Yeah, alright, fine. My quirk is called memory, and so is my hero name." You tell Bakugo after a long pause of thought. He clicked his tongue.

"So stupid deku was right. What the hell does memory mean anyways?"

"It means that I can copy any quirk that I can remember the details of. I have to know almost everything about it before using it, like how it works and where to equip it. But other from that it's quite easy to control."

Katsuki stares at you in shock. You figured that would happen, that's another reason you didn't want people to know. Everyone would expect so much from you, and they would all hate you because of how simple and powerful it is.

"It can't be that easy though, right?" He responds. To your surprise, he wasn't angry or jealous or disappointed. He was just calm.

"Well, no. I cant really advance the quirk, no matter how good I can be in controlling it or understanding it. For me to actually use a quirk I need to see it be done, which is kind of a pain in the ass to have such annoying limitations."

You expect something annoying from Bakugo, a sly remark or another comment. But you don't get anything. He just nods.

"Yeah. But be annoying as hell. You can't be better than anyone because they must be better first and then you need to see it to use it."

You were actually really pleasantly surprised with his maturity. He actually considered the real con of this quirk and brought it to light in an understanding matter. Could there be more to him than you thought? Could there be something there that wasn't there before?

He sighed and knelt down to pick up his bag. "Can we go home now? You said training was over, and i have a fuck-ton of homework still left to do."

His voice kept replaying in your head: Can we go home...before you might've thought it was annoying. But the way he said it right now, it was so pure and sincere. A home. For the two of you.

Never in hell.

"Yeah, alright." A cold wave of sadness washed over you. You told Bakugou your quirk, and one one hand, you knew you had to because of the mentorship (and he would've probably found out sooner or later since you two actually live together, how blind can he be?). But on the other hand, now it means there's no going back. He knows your secret, you two are ties together now. Even if you could back out of this mentorship or even living at his house before, you certainly can't now.

Katsuki must've noticed it, because now he kept trying to come up with a stupid fucking way to fucking cheer you up. It annoyed him, how much it bothers him. He shouldn't care, but he didn't want to see you upset. He knew he came up with something good when it hurt him to even think about it. He sighed.

"Come on, Senpai. We're gonna be late."

You looked up to see him staring into your deep eyes with his, instantly regretting the decision he made. You smiled.

"That's much better, katsu-chan."

Katsuki's body tensed.

Hell no. That's too close to what that asshole Deku calls me.

"No."

"Oh come on, please? Can I have a nickname for you?"

Bakugou scoffed. "I don't give a shit what you call me, but not that."

You sighed and gave it a little thought. Ba-chan? Ew, no. Maybe kugou-san? It wasn't bad, but there was something better. Katsu-ki. Kat-suki. Lord Explosion Murder? You've heard rumours about that one. If not katsu-chan, maybe you could do...

"Suki-kun!" You say. Katsuki turns around. "You responded!"

"No, I didn't mean to-"

"You turned around!"

"Shut up, Its not like that-"

"Awe, suki-kun!"

"Oh fuck, whatever, just keep it between us or i'll kill you."

"Yeah, yeah. Whatever Suki."

Both of you walked together, your hands dangling so close to each other they might touch, but they never did. You walked the rest of the way home in silence, watching the sky turn colours as the sun set. At home, it was just like any other day. You got there, showered, finished your homework, went downstairs for some dinner.

Except this time there was one thing different. A usually tired and indifferent Katsuki that always say across from you at the dinner table, actually had some eye contact with you, for the first time. He usually keeps his head down or argues until he goes to bed, this time it was different. You caught his eyes, it was a mere glimpse, but enough.

You convinced yourself that it was probably the light or the late night, but after your second of eye contact broke, you could swear that Katsuki blushed.