BNHA One shots.

Katsuki Bakugou x Midoriya's sister! Reader: Wouldn't hurt someone I love

You were walking through the halls of U.A high with your brother, Izuku, and best friends, Ochako and Ayako. Ochako and Izuku were talking to each other, both blushing like idiots, while Ayako was going on about some guy, you weren't really listening to her. You walked into the classroom and sat at your desk, which was right at the back of the room. You took your phone out of your pocket and started playing a game.

"OI! FLAME BRAIN! ARE YOU LISTENING TO ME?" Bakugou yelled. You'd been so fixated on your game you hadn't even noticed him walk in, and not his face was only a couple of inches away from yours. A blush appeared on your cheeks and you looked at your lap.
"H-hi K-katsu." You stuttered. You'd always called him this, ever since you were younger. He'd always called you 'flame brain' or 'dragon breath' because of your quirk. You had your father's quirk, which was the ability to breathe fire. You remember Izuku finding out that his twin sister had a quirk and it upset him a little at first, but he still stayed by your side. Bakugou found your quirk pretty cool too, but still thought his own was better.

"I was trying to ask if your dumb ass did the homework or if you needed to copy mine." He said. The homework had been about the history of heroes, which he knew you weren't good at. You shook your head.
"No, that's o-okay. I did it m-myself, th-thanks." You said to him and he just nodded.
"Alright." Was all he said before walking to his desk.

"Someone's got a crush on the class hot head, huh?" You heard Ayako say from beside you and she chuckled. Your face turned bright red and you covered it with your hands. You timidly nodded your head and Ayako let out a loud, fangirl-like squeal. "MY OTP IS GONNA HAPPEN!" She yelled and you sunk into your seat. Bakugou may not have heard that, but your brother did. And he had turned to look at you.

~Time skip brought to you by Bakugou's bad temper~

It was now lunch. You walked out of the classroom and felt a hand tap your shoulder. You saw your brother and sent him a small smile. "Hey! What's up?You need something?" You ask, tilting your head slightly as you asked.
"I heard Ayako during class. I was wondering who she was talking about? Do you like somebody?" he asked and you sighed.
"Yeah. I do. But..."
"But what?"
"You may not approve of who it is..."
"Well, who is it you like? I'm sure it can't be that bad."
"It's..."

~Bakugou's PoV~

Everybody was so damn quick to leave the class. I wanted to talk to dragon breath! Gah! This sucks.
"Well, who is it you like?" is that Deku? Who's he talking to? I walk down the hall a little more then hide round the corner once I see Deku talking to Flame brain. She likes somebody? Please don't say she likes somebody.
"It's..."

~Normal PoV~

"It's Katsu... I like Katsu." You say, looking at the ground.
"YOU LIKE KACCHAN?!" Izuku almost yelled.
"Shhhhhh! What if someone hears?!" You said, your face burning bright red.
"So he's the one you like, huh... Well, I guess it's okay. But if he hurts you, don't hesitate to tell me, alright?" Izuku said with a smile.
"I will, don't worry." You said and he walked away. Once he had and you started to walk, you once again felt a hand on your shoulder. You turned to see who it was and you were pushed back until your back hit the wall.

"H-hey K-Katsu. What's u-up?" You asked, smiled at him and a heavy blush coated your cheeks. Had he heard? Please say he didn't hear. Please say he didn't hear. Please say he didn't-
"I'm only gonna ask this once. Do you like me?" He asked and your face became even more red.
"Well, yeah. We've been friends for-"
"You know damn well I don't mean in a friend way." He said and you froze. He then leaned down and pressed his lips onto yours. You closed your eyes and slowly began to kiss him back. He pulled back after only a few seconds and looked at you.

"I guess the answer's yes, since you didn't seem to mind me kissing you." He said, a cocky smirk appearing on his face. He then leaned down again so that his face was only an inch away from yours. "Well, guess what? I like you too." He said before connecting his lips with yours once more. His lips then trailed down to your neck. When they landed on a certain spot on your neck, you gasped and he bit down on that spot, sucking on it gently, his actions drawing a quiet moan from your lips. He pulled back and admired his work.
"That looks nice on you. Don't cover it up, or you're getting more." He said with a smirk and you nodded. You then went to the cafeteria and ate your lunch.

"Uh, [Y/N]? What happened to your neck?" Asked Ayako once you sat down and started eating. Your face became bright red and your blue haired friend laughed. "HOLY SHIT! [Y/N] FINALLY GOT HERSELF A BOYFRIEND!" she yelled and you tried to hush her. "And looks like it's a rough one, too." Just then, your brother walked over. "Hey, Midoriya. Look at this!" she said, turning your head so that your brother could see your neck. His eyes widened.
"What's that?" He asked and you hid your face in your hands. "Please don't tell me that's a hicky. Mom's going to freak when she sees that."
Bakugou walked over and sat next to you.
"Kacchan, was that your fault?" Asked Izuku, to which Bakugou just smirked.
"Well, yeah. Obviously. She's only gonna let her boyfriend do something like that." He said in a cocky tone and you blushed.
"But Kacchan, maybe you shouldn't have made it so difficult to hide."
"What did I say to you, Flame Brain?" You sighed.
"Don't cover it up or you'll make more." You said and rolled your eyes.
"I made it so she can't hide it to tell everyone she's mine."
"Kacchan, if you hurt her-"
"I won't. I wouldn't be stupid enough to hurt someone I love." Your brother looked a little confused at first, as if he'd never heard him say anything like that before.

"Well, you may be a little angry and mean and scary most of the time, but I guess [Y/N] made a good choice."

"I guess I tamed the angry, mean, scary beast, huh?" Bakugou pouted and you, Izuku and Ayako laughed. You look at Bakugou and kiss his cheek.

"Relax. No matter how mean and scary you are, I still love you."

"I love you too, flame brain."