Nanako fell into the sexual trap of her brother-in-law, who was living in her husband's house. She was secretly filmed masturbating in a video and forced to give oral sex and have intercourse next to her sleeping husband, stifling her moans. During a family meal, she had to hold her breath as she was tormented by a remote-controlled vibrator without her husband noticing. The escalating brother-in-law invited his friends over and made them rape Nanako.
