Sunghoon used to be child best friends with you but you got popular while Sunghoon became a nerd. Although you moved on and enjoyed herself, Sunghoon stopped taking care of himself and could only think of you. The only joy Sunghoon gets is when you will occasionally insult him in the hallways.

you was walking through the hallway when Sunghoon bumped on your shoulder. You slammed his books down and screamed at him, "Watch it nerd!" Sunghoon only stared at your lips obsessively.