A story of friendship, teamwork, love and fight!
Aira is a normal girl from LA, whose life changed dramatically when, she leaves America for Korea to meet her father.Her mother died when Aira was 10 years old, in a car accident.In Korea she finds out  that her father is a rich businessman, and that she has  2 more brothers!Her father sent her to a private school, where she makes new friends: U-ji first year in the same class with her, Hyuna and Hana last year.She was fuound by an SM Entertainment manager,when she and U-Ji,Hana,Hyuna were singing on the street.

Will they be able to be number one?Find out what happens when girls will reach the company .... will remain in the same group or
someone will joined to ? Will they fall in love with boy idols ?