Teacher Nanako discusses with her husband about tutoring truant students at home. However, the students have no interest in studying and fail to concentrate on lessons, instead gathering at Nanako's house. When her husband leaves on a business trip, a large group of students quickly takes over her home. They brutally rape her and repeatedly assault her defenseless body. Over the three days her husband is away, she is violently taken by the students again and again, experiencing intense pleasures she has never felt before. This shocking experience changes her forever—she can never return to her former self.