Sakuraba Miko is a nun-in-training who has to pose as her twin brother, Sakuraba Mio, and take his place in the popular boy group, A.N.JELL. As she pretends to be her brother, she suddenly begins to fall in love with the lead singer, Katsuragi Ren.

The original Korean version aired in 2009 and starred Park Shin Hye, Jang Keun Suk, Lee Hong Ki, and Jung Yong Hwa.