Melyssa have many problems before she met Kyungsoo . She transfer to many schools because of her discipline . Many teachers can't manage her or teach her . She is really stubborn . She don't want to hear anything from anybody mouth because she will only hear to them if her father come back in her life . 

Kyungsoo is a good students and a good pianist . He also knows how to sing well . Everybody loves him since his first day in school . Sadly,he have a cardiac disease . He can't do sports or anything . That's why he spent half of his life in the hospital .