This started so good with the initial female character (Shizuko), her and MC's unite being so heartwarming and fluffy, that it was one of the most anticipated titles for me (and for many others, judging from the amount of 10 ratings), but gone so bad just in a couple of chapters.
1) Village "tradition" of women over a certain age being able to freely cheat on their husbands without the consent of the latter, without considering whether a husband still loves his wife and whether he is fine with her having affairs or not. Especially ridiculous considering all the "women are oppressed in this world" narrative. Being neglected by her husband and for him to have affairs seems like a vital condition here, but it is clearly missing.
2) Shizuko saying she "won't be coming home tonight", without explaining where she might go and asking MC if he is fine with it. Like, really?
3) Husband who repeatedly and insistently asks MC to fuck his wife while he's going to watch them. WTF? Normal reaction in this situation would be leaving them for themselves to decide. Still, the author clearly has his fetishes forced on the readers here.
If you are here for some vanilla isekai harem/romance/ecchi and not for NTR/cuckoldry, then I strongly suggest you look for some other title. Maybe this changes in a while, but somehow I do not feel it will.