Between humans and demons is a protracted war. At this time, the human hero gets into the castle of the Queen of demons and throwing her a call. However, the Queen wants to fight to Hero listened to her arguments. According to her research the war allowed people to unite against the common enemy. After the rich countries to share resources with the poor,deaths from hunger and disease have dropped dramatically. As a result, since the beginning of the war the population has not decreased, but rather increased. Moreover, the economy has become closely associated with the military action, and the end of the war will plunge society into chaos. A similar situation is observed in demons. Therefore, even if one of the parties, and win, it will soon begin a new war.However, the Queen has a plan how to make peace possible. For this, it offers the Hero to embark on her side, taking as its board itself. Despite the fact that the Hero of the hand in this case will not remain untainted, he agrees to the proposal of the Queen. ranobe Maoyuu Maou Yuusha from Tono Mamare.