Kasumi married her former mentor, a university professor. One day, her husband announces he will invite a student to their home to celebrate graduation, leaving Kasumi uneasy. The invited student, once infatuated with the professor, grew jealous upon learning of his marriage to Kasumi. Using their past feelings as leverage, he begins blackmailing her. His twisted desires drive him to humiliate and manipulate Kasumi like a toy, even in front of her husband. He brings accomplices and takes advantage whenever the husband is asleep, relentlessly cornering her. How much fear and inner conflict does Kasumi endure? Amidst tangled emotions of love and jealousy, how will she ultimately be transformed?