The Devil Is a Part-Timer! is a fantasy comedy light novel and manga series by Satoshi Wagahara with illustrations by 029 (Oniku), published in English by Yen Press, featuring a reverse isekai story where a demon lord is stranded in modern Tokyo.
After being defeated in his own world, the Demon Lord Satan escapes through a portal only to end up in modern-day Tokyo with no magic and no power. Forced to survive like a normal human, he takes a job at a fast food restaurant and tries to work his way up the corporate ladder. Meanwhile, his enemies follow him into this new world, turning everyday life into a mix of comedy, chaos, and occasional supernatural conflict. The Devil Is a Part-Timer! blends workplace humor with fantasy in a uniquely grounded way.