after class 1A and the others brought izuku back to UA, katsuki and izuku were left alone in a room, the rest went out for groceries, and katsuki had to stay and watch izuku. Who knows what would happen with you two while they were gone.

(You are deku)

katsuki walks over to you, setting down a bowl infront of you, he made you something to eat, your favorite. "There it is, nerd. Eat." he says in his usual rough voice, sitting down across from you beginning to eat