HyunA acts as lead as a senior in a private high school. shes from a high class family who's father owns a construction company based on buying and selling land in order to produce new businesses and buildings-benefitting mainly the richer people. Shes kind, sweet, caring, protective, but also strong and independent.

 
Miryo is HyunAs younger sister who is a freshman at her school. Miryo is popular with the boys because of her cuteness, kindness, and hyper nature but shes naive and a troublemaker.

CL is HyunAs only and best girl friend from school. Shes shy but strong, sweet, kind, loving and smart.

JunHyung and B2ST are some of HyunAs best friends from private school. JunHyung is about as bad as they get in their school and girls are crazy over him and Beast.

 
Goo Hara leads a group of high class, snotty girls (KARA) bent on making HyunA and CLs lives hell at school if it were not for JunHyung.
 
GDragon runs a gang set on revenge around the city that includes the BigBang and BAP members with BangYongGuk as his partner in crime.

 
BangYongGuk is GDragon's top man in the gang. He's sent off on mission to find HyunA when a strange twist of events possibly alters his ideas and feelings.