In the lands of Ente Isla, humans wage war against the demon king Satan. To flee from immediate defeat, Satan makes an escape to Tokyo in our modern world. Due to lack of magic he and his subordinate are forced to live a normal human life. The once powerful demon king now goes by the name of Maou Sadao and works at a fast food restaurant. Unknowingly, the human heroine Emilia went after the demon king, and is still determined to find and kill him. What will happen when the two arch enemies meet in the streets of Tokyo?
Both series are about a supernatural character who is forced to live a normal life. Their past interferes with their new life on a daily basis.
The main difference between the two is that while Hataraku Maousama is about a demon king who comes into conflict with a heroine, "Yuushibu" is about a hero who comes into conflict with the daughter of the demon king.