Somewhat, but not entirely. Black Butler has demons and humans. The demon makes a deal with the human (master) and after it's fufilled, the demon eats the human's soul. In Inu x Boku, Soushi serves Ririchiyo, but doesn't ask for her soul in return, like a dog. What's more, most characters on that Показать are part human, and part creature. Then again, no two animes are exactly the same.
