Tsumugi handles printer sales and has a shy, introverted, and slightly clumsy personality. Targeting her, a man named Nakata visits her under the guise of a door-to-door sales call and begins seducing her. Yielding to his advances, Tsumugi gives in to sexual intercourse. Nakata's company is facing financial difficulties, and after prolonged stress, his personality has become twisted. Taking advantage of Tsumugi's submissive nature, he uses her as an outlet for his pent-up frustration and seeks to dominate her completely. As Tsumugi exposes her true self to Nakata, her body and mind are thrust into even greater danger—she is handed over to Nakata's coworkers, pulled deeper into darkness.