Mami Nagase, who married her office lover, appears to live a happy life with her husband. However, behind this facade lies a dark conspiracy. Tricked by her department chief, Nakata, she gives in to him just once, only to have the entire encounter secretly recorded on his smartphone. When the video is shown to her husband, Mami is forced into a humiliating workplace training regimen. Though initially resistant, she gradually becomes addicted to Nakata's sex through repeated sessions. One day, Nakata demands, "I want to fuck you at your home—and right in front of your husband!" Under pressure, Mami allows Nakata into her home. With her husband drugged and unconscious, she submits to Nakata's advances. What will become of her marriage from here on?