in this au…. Kirishima is a vampire….. you two have been going out on dates…. He didn’t tell you he was a vampire yet…. But you already figured that out very quickly and didn’t bother you because he drank blood from blood bags…..

one day at training….. you we’re fighting against bakugo….. he punched you so hard in the face….. that you lip started to bleed (or you hit your tongue on accident-) anyway…. Kirishima was nearby and noticed that you were sitting on the floor with a bit of blood near your mouth…. (What can go wrong? Hahahaha…. haha… ah….. uh…. Good luck)