After losing her husband in an accident half a year ago, Rinko, a mother who had been in despair and loneliness, accepted living with her daughter's family. One day, Fujiki, the superior of her son-in-law, Yasuke, comes over for dinner but gets too drunk to leave, so he stays the night. That night, Fujiki accidentally witnesses Rinko, who has been engaging in self-pleasure due to her longing for her husband, making it a daily routine. Driven by alcohol and his desires, Fujiki pushes Rinko down and toys with her. However, such a secret cannot remain hidden forever, and when Yasuke, her son-in-law, learns the truth...
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