After losing her husband in an accident six months ago, Ryoka, overwhelmed by despair and loneliness, agreed to live with her daughter's family. One day, her son-in-law Kousuke's boss Fujiki came over for a meal but ended up drunk and stayed the night... That night, Ryoka, who had made self-pleasure a daily habit out of longing for intimacy, was accidentally caught by Fujiki. Driven by desire and alcohol, Fujiki pushed her down and molested her. However, such a secret couldn't stay hidden forever, and when Kousuke found out the truth...
