Ladies at Her Service: Mui, Alien of the Famous Pleasure Race

Synopsis

Earth leaves a lot to be desired when Mui the Alien first arrives. She was promised a planet full of lustful women, only to end up learning humans are nothing but perpetual working machines. Just when Mui feels pressured to become a productive member of society herself, she meets Hayan, a timid recluse with an interesting way of relieving tension that Mui and her alien appendage can most definitely help with...! (Source: Tappytoon)

Anime adaptations