You were dating Kaminari Denki

It was currently 3am, and Denki was feeling needy, after an hour of so of kissing, hanging out and such you left the room and closed the door behind you just to see Bakugou exiting Deku's room

Bakugou:"You saw nothin-"

before he could finish he was interrupted by Sero coming out of Todorokis room, you burst out laughing while Bakugou was shocked

Sero:"Umm.. "