the one that get to be his wife is altena the childhoodfriend/goddess after she get resurrected, before that he was going to "marry" the princess in a whim (she actually mistundertood what kane said) but altena resurrection happened, he adopt the loli from this chapter during the volume 2, this is kind of harem for a while, there a new girl that show up later counting the cat girl from the cover, there is a scene with the girls on who is going to be kane wife and they wear different wedding dresses, but kane end up choosing altena lol, btw this is too pretty much the cover for the LN. vol 4
extra info.
when he get to marry altena is a change from the WN in the LN, in the LN is at the end of volume 4, but that one part in the WN is a whole volume later you can say, for WN numbers, LN vol.4 end at 145 in WN which is the end of part 4 in WN, and the altena resurrection happen in 168-169 which is the end of part 5 in WN, so they moved 168-169 from the WN to the end of Vol.4, not sure if the author plan to continue the LN tho, because for what author said it was selling kinda bad and all depend on how the manga do