Yoon Sang Hee lived with her grandmother after her parents death 1 year ago. After 3 years her grandmother suggested that she return to South Korea, Seoul to visit her brother. He is the leader of the boy group of Cube Entertainment, BEAST. Her brother Yoon Du Jun stayed behind in Korea to pursue his dream of becoming a singer, and now that he is... along with his members, Lee Gi Kwang, Jang Hyun Seung, Yong Jun Hyung, Yang Yo Seob and maknae Son Dong Woon, they are the most famous boy group of Cube Entertaiment in Seoul. Her past is back to haunt her, and she soon finds out that she is falling for BEAST maknae, Son Dong Woon, without realizing that she builds a relationship with Lee Gi Kwang and SHINee's Kim Jong Hyun. Who will she choose?