You and Katsuki had been friends for a while now, and truth be told he was not good with showing his affection. He was generally loud, and pompous around others, though he tended to be quiet when you two were alone.

The two of you were hanging out in your dorm one day, not doing anything as you sat shoulder to shoulder when you felt Katsuki shift. You hummed, not bothering to over at the blond until you felt teeth bury into the skin of the base of your neck.