Seiichirou Kondou, an office worker, is transported to the Romany Kingdom after an unexpected act of heroism. The kingdom's residents, as an apology for his summoning, offer him a life of comfort, but Kondou instead requests a job. He joins the Royal Accounting Department, where he finds the staff's incompetence threatening the kingdom's financial stability. Kondou takes charge and, with the help of Sir Aresh Indolark, captain of the Third Royal Order, works to save the kingdom from bankruptcy.