Raul Chaser enrolls in the Hero Training Program with lofty aspirations of defeating the Demon King. However, after the Demon King's demise and the program's suspension, Raul finds himself working at a mundane electronics store, Magic Shop Leon. His routine existence is disrupted by the arrival of Fino Bloodstone, a charming new colleague who happens to be the daughter of the late Demon King. Tasked with mentoring this unexpected demon, Raul's life takes an unexpected and vibrant turn, far from the ordinary days of retail work.