Ko Mi-Nyeo & Ko Mi-Nam (both played by Park Shin-Hye) are twin brother and sisters. They grew up in an orphanage and never knew their parents. As a young adult, Ko Mi-Nyeo is set to become a nun. On her way to pick up a ticket for Rome a strange man catches up to her. The man\'s name is Ma Hoon-Lee (Kim In-Kwon) and he explains that he\'s the manager for popular boy band \"A.N.JELL\". He also explains that her twin brother Ko Min-Nam, who just joined the band, was seriously injured and sent to America to recover. Ma Hoon-Lee then pleads to Ko Mi-Nyeo to impersonate her brother until he recovers. For her brother\'s sake, Ko Mi-Nyeo reluctantly agrees to play her brother. A.N.JELL band member Kang Shin-Woo (Jeong Yong-Hwa) first discovers Ko Mi-Nyeo\'s secret, but he keeps it to himself. Kang Shin-Woo also tries to help her out without Ko Mi-Nyeo knowing. He also starts to develop feelings for her.