Shinbaku where Aizawa adopted Shinsou and Eri.



So whenever he goes out on date night with Presentmic the two teachers leave Shinsou and Bakugou to babysit Eri.

Bakugou being surprisingly good with kids and Shinsou being awful with them.

The two balance each other out.

Both pessimistic and overly sarcastic assholes that love each other.

I’m just thinking of Eri saying the funniest shit to Bakugou and lowkey bullying him.

The blond just keeps reminding himself that he can’t fight a child.

“Ew are you using bright mode instead of dark mode?”

“Yeah”

Bakugou is not nervous because he’s scared of a child roasting him. It’s just warm in this room.

“Please kill yourself and then change to dark mode like a normal person”

Eri gave him an innocent smile before-

Shinsou walked back in.

“There’s my favourite little sis”

The girl gave Bakugou a smirk as she hugged his boyfriend.

That first incident showed Bakugou how much of an asshole this kid was.

The next time something happens Shinsou is in the kitchen making Eri a snack.

“Hey Bakugou?”

The blond hesitated before speaking up and asking what she wanted.

“Nothing just wanted to hear your dumbass voice”

He turned to look at the kid and she was laughing at him.

“What’s so funny Erbear?”

“Bakugou just said something that made laugh”

The blond was looking at the two siblings. Now he got the similarities between the two.

They’re both rude people.

The next time is during a family dinner that Bakugou joined.

Aizawa, Presentmic, Shinsou and Eri all sitting together at the table with him.

“You know Bakugou I still love you”

“Aw thanks kid”

Bakugou thought maybe she finally gave up on trying to bully him.

“Even if you’re a bottom”

The blond chokes on his food and the three other men start laughing. Eri just giving them her signature innocent smile.

This bitch, is all Bakugou thought as he ate his food.

“Come on Eri, we’re gonna be late”

Bakugou stood at the front door waiting for the girl to walk out.

“Well maybe you should have yelled at me earlier”

He didn’t even reply to the kid. Just holding her hand when she finally came downstairs.

“Let’s go, make sure to follow me-

since you’re too dumb and suck at directions”

The little girl dragged Bakugou around and he just followed her. Knowing to not fight back against the kid



“You know what Bakugou?”

“What?” He asked deciding to humor her

“I think I have feelings for you”

The blonds face went red. He didn’t want to reject a kid, especially not his boyfriends little sister.

“What kind of feelings?”

“Homicidal ones”

Eri said it with a blank look on her face, like she actually wanted to kill him.

Bakugou totally wasn’t scared of a nine year old girl. He just didn’t want to be left in a room alone with her for a while.



“Goodbye Bakugou”

“Eri you’re supposed to say goodnight”

“I know, I just don’t want to see him anymore”

She was smiling at him as she said that.

“Sorry about her Katsuki, she’s usually never like this”

Bakugou had to suppress the urge to roll his eyes at that.

“It’s fine, she’s just a kid”



One night when Bakugou is just hanging out with his boyfriend. Shinsou decides to talk about his sister.

“Eri actually really likes you”

“Yeah fucking right, the kid hates me”

Bakugou didn’t even mean to say that, it just slipped out.

“She’s only like that with people she trusts, it took me two years for her to warm up to me”

“I’ve only known her for five months”

“That’s why I said she really likes you”

Bakugou smiled a little at that.

“Eri even told me that when she grew up she’s gonna steal you from me”

Shinsou was trying to hold back his laughter as he said that.

“What the fuck?!”

Bakugou’s face went bright red.

“Eri also said she was gonna marry you and that Bakugou is gonna be the mommy of her kids”

“Why the fuck am /I/ the mom?!”

“She said it’s because you’re a bottom”

Shinsou was bent over laughing so hard that he teared up

Bakugou was just happy that Eri liked him.

- the end -