GENU-004 Adulterous couple, stealing and being stolen, fucking wildly: A record of internal ejaculation in a couple

Nakazawa marries Sumire, who is a year younger than him, due to an office romance. She was living a happy married life with her young and cute wife, but there was one problem. Since getting married, I've been feeling impotent and my night life isn't going well... Then I happen to run into Ikeda, who was my boss at the company I used to work for. While they are talking about their current situation, they start talking about their sex life, and Nakazawa consults with his wife about things that aren't going well. Then, Ikeda asked me if I would like to swap his wife Rui and Sumire for swapping...