The description is a bit difficult to follow.
The main character, Tomoaki Kasu (MC), grew up in this town with his childhood friends Naomi (FML) and Kotaro (MFriend1) from a young age.
However, when Kotaro (MF1) graduated from school, he suddenly left the town, leaving two people behind.
A few years later-Tomoaki (MC) married Naomi (FML) and lived together in a new home that had been renovated.
My (MC) work was going well and my life was generally peaceful, but recently, Kazuaki’s (MFriend2?) energy and erection have declined for some reason despite his (MF2?) unchanging love for his wife (wife of MF2?), and he (MC?) has made his (FML) wife feel good enough in his sexual life. The only problem was that I didn’t …
I dunno, I'm lost. There seems to be either 4 or 5 people mentioned here, but I still can't follow the logic. Anyone that can help explain this?