Ore ga Akuma de, Aitsu ga Yome de.

Demons grant humans a single wish in exchange for their souls. Anzamnia, an ambitious demon with no souls to his name, is at the bottom of the rankings and has been forced out of the demon world by the police. In Japan, he searches for a human to make a contract with so he can return home. He meets a lonely little girl who believes he is an angel from Heaven. She insists that he grant her wish and form a contract, even though she knows it will cost her life. Anzamnia’s first contract is made, and her wish is for the two of them to get married. Their life together begins as an unusual couple from different races, ages, and personalities.