Nonoka Sato, once a female employee at SOD, had advanced her career to become a producer, enjoying smooth success both professionally and romantically, even considering marriage. However, her happy life is suddenly threatened by the appearance of a man who claims to be an obsessive "SOD fan." Wearing earphones and riding a bicycle, he abruptly attacks Nonoka while she's commuting to work. As a result of the collision, Nonoka gets injured and is forced to visit the man's home to apologize. This visit becomes the turning point that completely destroys her life, plunging her into a brutal nightmare of rape, degradation, and sexual slavery at the hands of the deranged stalker.