Thanks for the chapter!
You know, I wonder if humans can have children with elves and dark elves. Would be interesting to see the effect on the mothers as the mother and child share blood during pregnancy and the child would be part human. Good to see Sera helping out and stirring things up. Although the chances of her or anyone else actually having sex with MC is highly unlikely due to interference from the other women assuming they don't pass out just from kissing him like Sera almost did. Like Ria would always interrupt Sera's attempts and get too busy fighting if Sera tried to join her. As for Nash he's likely to be crippled from ODing on the human drug and having his family jewels receive critical damage.
In any case, be interesting to see what species the next harem member is. Right now MC has an elf, dark elf, vampire, golems in shape of maids, bear beastkin, slime, and a newman. Would be funny if a succubus joined in but got overstuffed just from licking his sweat or saliva. Could have a dwarf follow Sera or a demonkin wander in. Guess will have to see.