Single mother Haruka lives with her son. Her son is now a college student and she feels lonely both physically and mentally, neglected by him. At this time, for the renovation of the dormitory, she lets her son's friends stay at their house... However, her secret masturbation is witnessed by a friend who then blackmails and rapes her!!! As she resists the out-of-control desires of the youths, she begins to awaken to the forgotten pleasures of being a woman...
