Perhaps because things had become stale, the Namiki couple had become sexless, with the husband's erection becoming weaker. The husband was filled with feelings of guilt, and Haruka lived her days enduring the throbbing in her body. However, the husband had recently read about cuckolding on the internet and had become excited by it. One day, he finally decided to talk about cuckolding and asked his wife Haruka to try it. Naturally, Haruka refused, but she was eventually persuaded by her husband, who knelt down on his knees. Then, when they had sex in front of her husband, the more she felt a sense of immorality and guilt, the more pleasure overflowed. However, because her husband was in front of her, she pretended that it felt good, but it didn't. However, she couldn't hold back the surge of pleasure...