Things weren't as they appeared in the Kwon family. Ji Yong's parent's marriage had ended long ago, his father moving to America with his new wife shortly after Ji Yong reached fame. His only request was that Ji keep them out of the media. He didn't want his wife to experience any negativity. His other request was that Ji Yong keep his younger sister a secret. She'd been conceived while the elder Kwon was still married to Ji's mother shortly after Ji Yong himself had been born. This kind of thing was seriously frowned upon and could have hurt the girl's future. However, tragedy strikes, and Ji is the only family she has left. He's always been close to her even if he has had to keep her a secret. When he brings her back to Korea, there are many different reactions. The most surprised being Choi Seung Hyun, Ji's friend and fellow bandmate, who finds himself constantly drawn to the young woman but refuses to betray his friendship with Ji Yong.