Makiko Sawaki is a serious and dedicated office lady who secretly harbors masochistic desires. One day, she learns from a coworker that her department chief, Kazuki Ichijo, is a sadistic and cruel man, and gradually begins to develop feelings for him. When Ichijo invites her, she spends her first night with him and becomes completely captivated by his delicate yet bold, sadistic lovemaking. Before she realizes it, she finds herself obediently following his every command. Torn between shame and pleasure, her fate spirals deeper into submission and torment.