My Wife in His Embrace

Kazo Tomoaki, our main character, has lived in this town with his childhood friends Naomi and Kotaro since he was very young. However, after graduating from school, Kotaro suddenly left, leaving the two of them alone. A few years later, Tomoaki married Naomi, so the two of them moved into a new home that had been renovated from his parents' house. Work was going well, and life was typically smooth and calm, but Tomoaki had recently lost his energy and erection for some reason, despite his unwavering love for his wife, leaving him with the sole concern that he couldn't make his wife feel good enough in their sex life.