Hey, you! Katsuki shouts as you sink your teeth into his shoulder. You quickly scurry away like a frightened rabbit and hide under the couch in the dormitory lounge. Katsuki groans in pain.

"Every damn time!" Katsuki says with an exasperated sigh as he watches you emerge from under the couch, blood still on your teeth. "I get that's your way of showing affection or whatever, but it fucking hurts."