The four heavenly kings of the Demon King's army who reign over another world. The person chosen for the last seat was... Dennosuke Uchimura, a dull salaryman! Headhunted by the Demon King's army, Uchimura was offered a position at the executive level, but the Demon King's army's work is a series of tough missions that put his life on the line...?! Uchimura, who has no special skills, faces the challenges of this other world with the experience and wisdom of a salaryman! A story of changing jobs in another world for all working people!