As a female reader, I'm really glad he's monogamous. The tags said it (no Harem tag at all) but he's actually really faithful so I'm at peace with this supreme guy lol. There's too many Harem Isekai out there I'm starting to lose faith reading any Isekai at all, as that's unfair for us single readers lolol.
Btw his original appearance is a super pretty boi, but now he's a handsome wholesome bishie so yeah he feels just right. Good character design choice for this manga.