When your older brother is admitted to hospital, you're willing to do anything for him to stay alive. Even if that means disguising as a guy and entering the brutal competition GROWL .Sounds simple? Not when your classmates are delinquents.
Eunjung,Sooyoung and Seohyun are bestfriends and Lee Minho, Nichkhun and Kim Soohyun are bestfriends. Nichkhun is Eunjung's bestfriend. He has always liked Eunjung but not until he met Sooyoung, Eunjung's bestfriend. Soohyun meets Eunjung and pretends to not like her, but deep inside he has feelings for her. Seohyun and Minho hated each other but then started falling for each other.