Kaika: Ochita Elf Tsuma

Talia is the daughter of a famous elf craftsman, renowned for his talent in both the elven and human realms. As his daughter, she uses her skills to make jewelry, which she later sells to a kind human merchant she's grown attached to.

When Talia's father departs for the human realm, it is up to his wife Lena to take care of their daughter. Once he's gone, however, the merchant wastes no time revealing his true nature. Powerless to stop him, and with her husband gone for an entire month, Lena hopes to spare Talia from the merchant's carnal desires by offering her own body instead.

(Source: MAL Rewrite)