After returning home from jogging, Rin Kaguya runs into a student living in the same apartment building. The young man is instantly smitten by Rin's pure, beautiful appearance and nervously attempts to approach her. Seeing his flustered state excites her, and she impulsively invites him into her home, revealing her aggressive, dominant side. Enchanted by her allure, the young student gradually submits to her, taking on a submissive role. However, consumed by passion, he eventually demands that Rin divorce her husband. That single statement throws her life and her husband's life into chaos, driving the three into a new and dangerous crisis.