Chinese Title: 原来是美男啊
Cast: Jang Geun Suk, Kang Soo Han, Park Shin Hye, Jung Yong Hwa, Lee Hong Ki, Uee, Bae Geu Rin, Kim In Kwon, Jang Won Young, Choi Ran, Kim Sung Ryung, Jung Chan, Choi Soo Eun, Tae Hwang, Kim Ho Chang, Lee Joo Yeon (cameo), Yoo So Young (cameo), Yoo Seung Ho (cameo)
Synopsis: Go Mi-nyeo (Park Shin-hye) has lived at an orphanage with her twin brother, Go Mi-nam (also played by Park Shin-hye), since childhood, after their father passed away. Years later, her brother becomes a music idol, and Mi-nyeo lives in junior nun dorm to reach her dream of becoming a nun. Her idol twin brother Mi-nam, successfully wins the "A.N. Entertainment" vocal auditions for musical band "A*N.JELL," but Mi-nam must leave in order to correct his botched plastic surgery in the United States. Ma Hoon-yi (Mi-nam's manager, played by Kim In-kwon) approaches Mi-nyeo to pose as Mi-nam while he recovers. Mi-nyeo is against it at first, but agrees in order to find their mother. Mi-nyeo posing as Mi-nam joins the band A.N. JELL and meets its members: Hwang Tae-kyung (Jang Keun-suk), Kang Shin-woo (Jung Yong-hwa) and Jeremy (Lee Hongki).
At first, Tae-kyung does not like Mi-nam and makes her life hard, while Shin-woo and Jeremy are friendly to her. Tae-kyung discovers that Mi-nam is a girl and threatens to reveal it; however, Mi-nam manages to win him over, and he allows her to stay, while fighting his feelings that are beginning to develop. Shin-woo discovers her true identity but does not reveal it and develops feelings for her; Jeremy, thinking Mi-nam is a boy, unknowingly starts to fall for her too. The story follows Mi-nyeo, who has to keep her secret away from the cameras while performing with A.N. JELL, and her journey in discovering her mother's past, which is somehow connected with Tae-kyung.
