My Girl's Boy (2007)
Seok-ho (Choi Won-yeong), a self-styled playboy with a beautiful wife, is fooling around with Ji-yeon (Ko Da-mi), a voluptuous photographer, but pines for Chae-young (Kim Poo-reun), a college student who appears to be the most virtuous girl in all of Korea. But it turns out that Chae-young, who frustrates her suitor at every turn, is not so chaste after all. The plot thickens as Seok-ho's best friend Young-su (Ko Hye-seong), outwardly awkward and shy, sets his sights on Ji-yeon, not realizing that she is already involved with his best buddy. They are unaware of their indirect interrelations until they are all invited to a concert.