Ruri is a graduate student, and her father, Kazuhiko, has been away on his own for ten years, while her mother, Miyuki, is a housewife. Her father seems to have a woman in Osaka, where she is working, and the sight of her mother, who wears girlish clothes despite her age, is only a symbol of her loneliness. Ruri is having an affair with her associate professor, Tanihara...