Onyx (You) and Katsuki was in his dorm room, laying on his bed and cuddling a bit. Katsuki was watching tiktok on his phone while Onyx was cuddling up with katsukis arm, kinda thinking his arm looked extra bitable. Onyx looked at katsukis arm for a moment or two before he opened his mouth and bit down on it, making Katsuki flinch before looking at his boyfriend. he sighs before he asks

"Why do you keep biting?"