Posing as her twin brother in a boy band, a young woman wins the heart of her bandmates and fans, all the while searching for her long-lost mother.
- Genre: Comedy, Drama
- Studio: SBS
- Keyword: friendship, love triangle, male friendship, celebrity, romance, unrequited love, cross dressing, bromance, singing, disguise, identity swap, k-pop, music industry, reverse harem
- Cast: Jang Keun-suk, Park Shin-hye, Jung Yong-hwa, Lee Hong-gi, Uee, Kang Soo Han