Girl By Girl (2007)

Cast
Lim Seong-eon (임성언) as Eom Yu-Mi
Kwak Ji-min (곽지민) as Oh Se-Ri
Kim Kwang-min (김광민)
Kim Jong-yeob (김종엽)
Min Se-yeon (민세연) as Hee-Jeong

Also known as "Girl x Girl"

Trailer

Synopsis
A model student and a troublemaker fall in love with the same guy. The troublemaker lies to the model student, telling her that the guy likes wild girls. So the model student tries to turn herself into a troublemaker. Then the troublemaker tries to become a model student, in order to win the guy over. A low-budget student film originally produced for cable TV, Park Dong-hun’s Girl By Girl stars Kwak Ji-min, who is best known for her role in Kim Ki-duk’s Samaritan Girl.