You're the new student who was much prettier that the most beautiful girl of the school(yoona) which made her jealous and kept bullying you and hurting you with no sympathy On the other hand.. Taehyung who's the most attractive yet handsome guy in the school was attracted to you but never admitted it or confessed to u...

Someday, it was your birthday as yoona and her friends got a cake and acted like they're celebrating it with her but for real.. Yoona pushed you to the pool (you can't swim)