Elf No Waka Okusama

Storyline

A man marries an elf, only to discover there is a problem involving "compatibility". He goes on a quest for "Harpy Ooze", which can only be supplied by harpians, who keep men as slaves to help bear their offspring. Meanwhile, his elf bride faces prejudiced humans, and this brings up another problem; will the villagers ever accept their mixed marriage?