The Devil is a Part-Timer!!

Satan, the Demon Lord, attempts to conquer Ente Isla but his plans are thwarted by Emilia, forcing him to flee through a dimensional portal and end up in modern-day Tokyo. Along with his general Alsiel, Satan is stranded in the human world and vows to return to Ente Isla, but for now, he must adapt to a life without magic. To survive, Satan assumes a human identity, Sadao Maou, and takes a job at MgRonald's, a local fast-food restaurant, where he sets his sights on advancing through the corporate ranks rather than simply conquering a new world.