It's school festival day and Min-hyuk is busy dancing and singing. However, it is not the stage but a toilet that binds his destiny. He is bewitched by a daring high school girl, Mi-hyun, who comes into the men's room because the women's room is full. From that day on, Min-hyuk woos her, escorts her home at night, stuffs her locker with roses, and clears passages for her in the morning after a snow fall. For all his efforts, he doesn't get much more than a tender glance from Mi-hyun. When she suddenly vanishes "sorry" are the only words she leaves behind.
Yu Mi-young, an ordinary housewife, loses her husband in a car accident. Two women come to his funeral and she is raged with his betrayal. She finds out in his diary that it wasn't an accident and plans a revenge against the two women, Sin-ae and Su-mi.
