The Kobayakawa family lives in a grand mansion, yet their home life is bleak and joyless. Naoya leads a humdrum existence as a salaryman, while his wife, Keiko—unable to rely on him—works as an insurance agent. Their marriage has gone cold, and their daughter, Saori, is fed up with them both. One day, Naoya falls head over heels for Madoka, a friend of Saori’s who is visiting their home. Meanwhile, Keiko, harboring growing sexual frustration, becomes consumed by an affair with a client named Harada. As for Saori, she finds a connection with Kazuhiko, a young man whose feelings for her have crossed the line into stalking...