20-year-old Jeong-hee doesn't go to college and works part-time. She goes to meet Min-young, her old high school roommate, for the first time in a while and wants to play with her as before. However, Min-young, a college student, is busy sending correction emails for her credits and feels uncomfortable by Jeong-hee's visit.

Young-sil and Insik become lovers eight hours after meeting. Insik is certain that Young-sil is a free spirit. Anxious Insik makes Young-sil promise that their love will be forever, whatever happens. Young-sil tries to keep the promise, even after their breakup. 8 years later, Young-sil likes Woodo, but is unable to do anything.