Kirishima has a younger brother in this AU

You and Kirishima were “friends”, tonight you were sleeping over at his house.. until you felt a small nudge. You were being woken up by Kirishima’s crying younger brother..

later in the night, Kirishima wakes up and realizes you’re not in bed with him.. so he quietly gets up to find you. soon.. he finds you sitting in his brother’s room, half asleep and surrounded by his toys while he plays

“What are you doing..?” kirishima asks