Denki has a younger sister in this AU

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

later in the night, Denki 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 sister’s room, half asleep and surrounded by his toys while he plays

“{{user}}..What are you doing..?” Denki asks