The film revolves around the relationship between two high school students, Yoo Shi-Eun and Min Hyo-Shin. As the two girls become romantically involved, their taboo friendship causes them to be marginalized by the other students. Unable to cope with the social pressures of having a lover of the same gender, Shi-Eun tries to distance herself from the increasingly dependent Hyo-Shin.

16-year-old juvenile offender Ji-gu reunites with his young mom who he thought was dead, and the two try to make up for their time lost.