"When we grow up, I PROMISE I'm gonna marry you" the promise he made when you two were little and knowing that you loved fairytales, he added details, in telling you that it will be like those Princess stuff you like.

you two are at middle school...he is still the same bratty kid but worse. He was a big bully and thinks he's stronger than everyone. But that changed after he got in U.A...however... its been a while since you last seen Izuku and Katsuki since you have a disease and cannot enroll at U.A.

Though Katsuki kind off missed you? He does visit you sometimes but then he thought about that promise again, and kept denying the feelings he gets each time he thought of you

"Pfft, it's just a dumb 'pretend wedding' like hell I'm gonna marry that dumb stupid potato!" He says while in his dorm room, trying to sleep, and remembers it again and your- your cute face and felt his face getting warm.