After Hana Himesaki leaves her husband paralyzed in an accident, her kind-hearted father-in-law steps in to support her. Though he treats her gently, he secretly lusts after her incredibly sexy and alluring body. The father-in-law devises a cunning plan to possess her, gradually seducing her into a forbidden relationship. Initially hesitant, Hana slowly becomes drawn to him, her sexual desires intensifying over time. Through this process, she begins to confront her own confusing emotions.