It is assigned that hyunwoo is a enemy to jiyeon but at last they are in love seunghoo and seoyeon wanted to breck them up.But they failed.

Main Character:

LEE HYUNWOO:jiyeon's enemy,but will be lover,iu's big brother,highschool student.

PARK JIYEON:hyunwoo's enemy,but will be his lover,suzy's big sister,highschool student.

Other Character:

IU:want hyunwoo to be with jiyeon,hyunwoo's young sister,highschool student.

SUZY:want jiyeon to be with hyunwoo,jiyeon's young sister,highscool student,iu bff

SEOYEON:have a crush on hyunwoo,jiyeon,iu and suzy enemy.

SEUNG HOO:have a crush on jiyeon, hyunwoo enemy.

SULLI:jiyeon's bestfriend,minho's gf,want jiyeon to be with hyunwoo

MINHO:hyunwoo's bestfriend,sullibf,want hyunwoo to be with jiyeon

JB:is like a brother to everyone.