Eienko, with golden hair and blue eyes, is called "the devil's child" by the villagers and is hated by them. She lives a strong life, aiming to repay her beloved grandmother, her only ally... but one day, she suddenly finds herself in a world of demons! In order to return home, she must marry the god of death who rules the world...? A Japanese-style Cinderella fantasy about the strongest Shinigami and his contract bride!