In the aftermath of a war between heroes and demons, a hero in training and a demon lord's daughter must work together as shop assistants.

The story revolves around Raul, a boy who did not become a Hero, since the demon lord was already defeated just before his Hero exams. His dreams dashed, Raul spends his days working at a magic shop in the capital. One day, a part-time job seeker appears at the shop with an amazing résumé: Name: Fino Previous Occupation: Demon Lord Heir Motive: Because my father was defeated The work comedy revolves around this former Hero-in-training and the daughter of the demon lord.