I was reading another day a manga about a Polar Bear that was a human isekaid and he was taking care of a family of female werewolves.. there's a lot of fighting too!!
try this tag: http://www.mangago.me/tag/polar%20bear/
I think this is it
http://www.mangago.me/read-manga/shirokuma_tensei/

I'm looking for mangas with Harem or reverse harem but it's mutual and kind of poly relationships..
I KNOW I 'm asking for too much but I just cant believe they don't exist