Bakugou x Sister!Reader - You're dating?!

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Katsuki shut the door as he entered his house, avoiding the yelling of his mother and going straight upstairs. He had heard from some of the other students that his sister, his OWN SISTER, had gotten a boyfriend. He didn't like that, and if he knew who the guy was that she was dating he would make sure that they see misery. Yeah, he had a temper, but he was pretty overprotective of y/n and he knew that she could take care of herself. But that still didn't mean that he was going to like it, so he's going to have to talk to y/n at some point about it.

"Alright, you extra, I need to talk to you about—" he said as he opened the door to see y/n with her boyfriend ... sucking face. This was definitely not the best way for first impression of her boyfriend.

"KIRISHIMA?! WHAT THE ACTUAL FUCK—" he yelled, literal steam coming out of his ears.

Y/n quickly removed her hand who was intertwined with Kirishima's once she saw her brother enter the room; this wasn't going to end nicely.

Katsuki stomped into her bedroom, red eyes still widened, "I HAD A FEELING YOU WERE DATING SOMEONE, BUT I DIDN'T THINK IT WAS THIS BASTARD,"

"I-I know ... but I care about him a lot—"

"I DON'T GIVE A FUCK,"

"H-Hey Bakugou, let's be manly about this," Kirishima said quietly, putting his hands up as if he was guilty for something.

"YOU SHUT YOUR FUCKING MOUTH HAIR FOR BRAINS,"

You looked down at your hands, listening to the two men you care about literally arguing about you.

"Katsuki, please ..." You said quietly, making the two actually stop what they're doing to listen to you.

"We've already talked to mom and dad about it and they're okay with it, so you should be okay with it too...alright?"

"Tsh," was all Bakugou said before turning on his heel to leave your room, "Just because dad and that old hag are okay with it doesn't mean I have to be. You take good care of her Kirishima or I'm gonna kill you myself,"


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