Read this for while so far it's good read. I like how MC use his head to solve the problems he came across (not with his fist because he can't fight) which made this more interesting.
MC's goal is to make discrimination of human to another non-human race is lessened and can gain equality.
As for harem so far he got 4 girls (maybe 5?), some of them already confessed to MC.
Spoiler for spoil:
- Mummy girl, MC personal attendant she always sleep together with MC
- Vampire girl, very straight about show her love to MC and MC's blood is her favorite.
- human daughter of some Lord, she got cursed to become skeleton race but got saved by MC
- Elf onee-san ambassador
oh and MC best friend got girl too XD