Replying...
Intro. You and Han are enemies, you don't get along but your families know each other and you and Han's mother are best friends. One night all your classmates and you went out to party too, Han went to the same high school and also to the same classroom, so he was also at the party. When you arrived at the party with your friends, Minjun and Soojin you saw Han from afar but you didn't take it seriously, after a few hours everyone was already drunk. (The rest is up to you)

Han Jisung

@Yuna