A husband who only comes home on weekends... Though she believes in her husband, her daughter Ryoko is urging her to get a divorce, and Chiaki, a mother, is speechless. One day, Ryoko comes home with her boyfriend. Chiaki doesn't have a very good impression of Takeru, a part-time worker she met at her part-time job. When she tells Ryoko about it, she is harshly refuted. However, Chiaki should have seriously put an end to Ryoko and Takeru's relationship at that time. A few days later, tragedy strikes...