[Machine Translation] Satan, the Demon King, who was one step away from world domination, was defeated by the heroes and ended up in Sasazuka, Tokyo, in the other world of "Japan. What can the Demon King do in Japan? That is, of course, "world domination"! Satan is not a hero, but a freelancer who earns his living by working part-time at a fast-food restaurant in front of the station! At the same time, Emilia, a hero who had crossed time and space in pursuit of the Demon King, was also battling the Japanese economy as a telephone attendant. The two meet again in Tokyo...? A fantasy for the common people unfolds as the freelance Demon King works hard today in his temporary Demon Castle, a six-tatami-mat apartment. Winner of the 17th Dengeki Novel Award "Silver Prize".