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Yurika, a married woman who lives with her son. One day, a college student's son brings his friends home to write an assignment report. A friend who witnesses Yurika indulging in masturbation in the bedroom late at night commits Yurika unbearably for her foolery. Despite being a criminal, the body reacts to the pleasure that I have forgotten for a long time and gets drunk without resisting the climax that comes, and Yurika drowns in pleasure.