This also called as "The Devil is a Part Timer", is an action, romance and also comedy type of anime. It's about a world named Ente Isla where there lived devil and Hero, Sadao (The black hair) is a dark lord of the demon at that time, until all the hero, especially Emi (The red hair) almost killed Sadao and followed Sadao and his loyal assistance, Ashiya (the white hair) to another world that they called "Japan". Sadao and Ashiya that didn't know anything about Japan find it weird, the actually get caught by the police and with their power, they hypnotized the police and get as much information to know about that place. They then find it hard to refill their power there, and they find out that they transformed into a human form and have to find money to support their life. Sadao finally decided to work in a fast food restaurant while Ashiya, work in the household. Chiho (The pink hair) is Sadao workmate, she love Sadao. Emi, finally met Sadao and find it weird that the evil lord of satan already transformed into a poor usual innocent boy.