He will have several girls around him, but in the wedding chapter marries 3 of them.
The girls up to the point I have read are this spider who evolves to be partly humanoid (look at the covers page, she is evolved on the 3rd one)
A elf knight war slave he bought to act as a bodyguard (there us a backstory as to why she was a slave, it i voices betrayal and a horny entitled noble, but he willingly frees her with his other slave girls after reaching a certain criteria, wife #1)
Another slave he bought to serve as a house keeper, her family was killed by bandits and she was sold into slavery by them (wife #2)
These 2 are bought shortly after he leaves the village and moves to the local city.
A fox? Beastman debt slave he purchased a while later in the nation's capital to act as an alchemy assistant, the work is profitable enough for her to free herself but she keeps sending the earnings to her family.
Another beastkin (rabbit?, sorry been a while and I forget) wjdow he hires as a maid (wife #3) when he is contracted to help establish a border fort/trade city (he goes way overboard)
The girl from the summoned hero's, she is the only one of the 3 with a brain, and ran away from the summoning nation the first chance she got. (Keep in mind he got sent back 3 teaes prior to the summoning)
The hero girl's slave-maid who was treated as a thing in the summoning nation, because she is not human and they are INCREDIBLY racist/speciesist/human supremacist.