My Girl Boy (2007)

Seok Ho, a self-styled playboy with a beautiful wife, is fooling around with Ji Yeon, a voluptuous photographer, but pines for Chae Young, 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, outwardly awkward and shy, sets his sights on Ji Yeon, not realizing that she is already involved with his best buddy.