Looking for a fantasy/adventure series with a couple of specifics - Please Help!

Hi,

Thanks for reading my post! I have combed the internet and Baka-updates to find what I want but to no avail :( Hoping someone with a bit more breadth of knowledge may be able to help me out please!

What i'm looking for really is something quite similar to "Tate No Yuusha no Nariagari" or "Mushoku Tensei" in the adventure and fantasy general aspect of the story. A story of progression and evolution of the main character in a new/alternate world with a fantasy setting. The main thing that different is that I would like a novel with relationship's between non-humans and humans, like Firo and Raphtalia in Tate no Yuusha (although I thought it was a bit childishly done, and would like to see a more mature approach to it). I didn't mind the idea that they were slaves, im flexible on quite a few of the points as finding anything is hard enough! I just want some kind of animal characteristics on the female, or a succubi, vampire, faerie, pixie (any others) etc. Im interested in delving into a series with quite a deep relationship between a male lead and a female demi/non-human.

So far I cant seem to find anything bar the two stated and a couple i've read that are kind of acceptable like "Is it wrong to pick up girls in a dungeon", but I would massively appreciate it if someone knew of something with more than a single book out (a series) in English that loosely fits my specified context? (Or anything you think may help me if not?)

Many Thanks!

Matt

Looking for a fantasy/adventure series with a couple of specifics - Please Help!