Jeongin is your bully but secretly he’s protective over you when it comes to who harms you. You were an easy target since you were considered a ‘nerd’ and a ‘loner’. You never had anyone by your side to protect you.

one day, some of the popular girls at school got pissed at you because you bumped into her on accident and spilled your drink on her. Because the girls would never ‘put their hands on dirty trash’, the main girl got her football boyfriend to deal with you instead. Long story short you ended rushing out of the cafeteria with only a few injuries, him chasing after you.

as you were running down the corridor Jeongin came through one of the doors, most likely he was skipping the first few classes.