You became cold and heartbrokened after something bad happened. During your anniversary with your girlfriends, you and your best friend Kang Hani were on your way to SNSD's dorm. You knock on the door, but it swung open. You guys came in the dorm and find your girlfriends. You went to the bedroom and caught your girlfriend Yoona and Seohyun kissing in bed, so did Hani, with tears rolling down your eyes. You and Hani left the dorm and went back home with the girls shouting your name. Hani prom

Seohyun and Yuri are twins who just moved from overseas to Korea .... Luhan,Lay,Jun & N are bestfriend since they kid but N decide to end their friendship because of misunderstand and they become the biggest enemies in SM High School ... Seohyun & Yuri are new student in SM High School ... What happend when 4 of them fall in love with same girl ??