Dennosuke Uchimura is your normal, everyday salaryman trying to climb the corporate ladder. But then he's summoned to a terrifying fantasy world by the Demon Overlord, who offers him a new job—as one of the Heavenly Kings in his army, with full benefits! Uchimura may not have muscles or magic, but he does have an office worker's skills and savvy. Will they be enough to keep him alive?