You’re Beautiful OST Promise by

Tae Kyung and On Yu are in search of a new member for their idol group, . However, Mi Nam suffers an injury at the last moment. So Mi Nyu, his twin sister, is asked to step in for her brother. The rest of the drama follows the behind-the-scenes life of an idol group. Cast Jang Geun Suk as Hwang Tae Kyung Park Shin Hye Go Mi Nam (Male) / Go Mi Nyu (Female) Lee Hong Ki as Kang On Yu / Jeremy Jung Yong Hwa as Kang Shin Woo