Maki Hojo is a married woman living alone with her son while her husband is stationed overseas. One day, her college-aged son invites a friend over to work on a school report. Late at night, the friend accidentally discovers Maki pleasuring herself in her bedroom. Using what he saw as leverage, he pressures her and forcefully takes her. Though she resists at first, the long-forgotten pleasure overwhelms her body, and she gradually succumbs to the sensations, climaxing repeatedly as she sinks into ecstasy.