One day, her husband returns home with a younger male colleague, and the man, having obtained leverage over him, secretly starts manipulating her. His demands grow increasingly aggressive, culminating in him barging into their home and forcing himself on her at the front door. Determined to destroy the couple's marriage, the man then forces "Riku" to masturbate while he watches, trying to resist with sex toys. The story unfolds with him ultimately violating her in the couple's own bedroom.