The manga is notorious for three things that drive readers to seek a "fixed" version:

How Does The 'Domestic Girlfriend' Manga End? - The Boba Culture

Because this is an adult niche title, professional localization teams (Seven Seas, Fakku, Irodori Comics) have only recently picked it up. For years, readers relied on Google-translated or MTL (machine translation) versions. These were "broken" in the sense that:

If you are looking for the best reading experience, search for the title "Fuufu Koukan Modorenai Yoru" on the Coolmic app or website. This is the primary outlet for the official English localization.

The "fixed" narrative of this manga serves as a cautionary tale. It suggests that once the sanctity of the "private" bond is shared with others, the foundation of the original relationship often collapses. It is a study of the "point of no return" in human intimacy.