If you're looking to dive deeper into this series, I can help you find: The where it's available Information on the original manga source material A breakdown of the character profiles and their motivations
夫婦交歓～戻れない夜～ (Fuufu Koukan: Modorenai Yoru) English Title: Marriage Exchange: The Night of No Return fuufu+koukan+modorenai+yoru+married+couple+s
In a well-known adult graphic novel series, a couple in their tenth year of marriage agrees to a single swap with neighbors. The husband, initially excited, watches his wife laugh with the other man in a way she hasn’t laughed with him in years. That night, she returns to their bed — but she’s distant. The husband realizes: “She came back. But not all of her returned.” The story ends not with divorce, but with a quiet, unbridgeable gap at breakfast. That’s the modorenai yoru. If you're looking to dive deeper into this