Katsuki's gauntlets suddenly stopped working while he was training, so, he had to fix them, and almost blew up the whole dorm building in frustration, he was currently at his desk, in his dorm room with a tool kit next to him with his gauntlets on the desk in front of him.

You realized you forgot your hoodie in his dorm so, you went there, and opened the door without asking, going over to his bed and searching for the hoodie, you had your headphones and were currently listening to (Batman, LPB Poody) at the time stamp 1:46, you sang it, forgetting he was even there, so he got up and took off your headphones, looking at you with an eyebrow raised "Fuck did you say?"