I always thought that in NTR games we played as the other guy, not the boyfriend.
Same for manga/anime with NTR, I always assume that those who like it, see themselves in the other guy's skin, never in the boyfriend
The MyAnimeList says it goes to chapter 29, is there more or is the numbering incorrect?
Tada Shiawase na Isekai Kazoku Seikatsu: Tensei shite Kondo koso Shiawase ni Kurashimasu