Four years after her debut, Yura Kano takes on the role of a married woman for the first time. Her boss, Oki, who has long desired her since she left the company after an office romance marriage, cunningly arranges for her husband to be sent on a business trip out of town. Once Yura is alone, Oki slips her sleeping pills and forcibly rapes her in a hotel. He then installs a duplicate key to her home, ensuring she can't escape. Repeatedly violated, the once pure and modest Yura is systematically trained by the man she despises. Initially overwhelmed with guilt, she gradually transforms into a pleasure-seeking woman who comes to enjoy the sex.