Youre 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 behindthescenes 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