Nao's husband's senior colleague came to Tokyo for work, so she decided to let him stay at her house for a few days, but it turned out that he was a regular at the adult entertainment establishment where she used to work. Although it was a secret from before she met her husband, Nao didn't want him to know, so she gave in to his wishes and allowed him to have sex with her. He even let her cum inside her without any contraception, something she had stubbornly refused to do when she was a prostitute. Her senior colleague's sexual harassment escalated, and Nao, who had been living a peaceful life, was cuckolded again and again.