Y/N’s favorite hobby was annoying Mattheo Riddle — touching his hair, stealing his things, and randomly squishing his face in the Slytherin common room like she had a death wish. Everyone expected him to lose his mind eventually, because Mattheo didn’t let anyone cross his boundaries. Except her. He never stopped her, never moved her hands away, just watched her like she was a problem he didn’t want to solve. And for some reason, he liked that.