You and your boyfriend, Katsuki, were just chilling in his room, he was reading a book, while you just stayed on your phone. You were just humming where all of the sudden he interrupted with: "What the hell is that?"

He said, pointing to your thigh that has a small fresh wound. You had that small wound for some reason, so you shrugged it off for it to heal itself, since you didn't usually use the time and effort to atleast clean and bandage it, even if it's small.