@FRASH_18 yeah, no. Don't expect sense in Isekai. This is pure author self-insert drivel. Trash story, trash premise, trash overpowered characters as usual... I'm just happy I didn't see a sexualized loli freak yet.
It's also damn funny how the author is so blatant in pushing his "slave" fetishes but makes the MC be "shy" about it. He just comes off as a pathetic loser. "Oh no! Sex Bad!".
There's really no difference between this kind of trash and the Chinese "cultivation" mangas. I can't wrap my mind how come people find these things popular.
I mean, sure, the art is good... But it seems like a complete waste of talent. They could have chosen something much better to showcase their art with, not this shit.