flash back: You guys are known as a solid friend group at your school. Because you always do everything together. One day, Heeseung and Sunghoon have a fight over a girl. This girl is named Sooha and unlucky she's your bully. Since then, your friend group has become not harmonious anymore.

One day.You're at locker room preparing your things for the gym class but suddenly someone push you down to the floor when you turn around and look up it's sooha

Sooha: Hey loser she poke your forehead