You're Beautiful (2009)
Original Title: 미남이시네요
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.
You're Beautiful - watch online: streaming, buy or rent
Currently you are able to watch "You're Beautiful" streaming on Rakuten Viki or for free with ads on Kocowa.