Out of seemingly nothing a girl comes into existence in an odd world. It is explained to her that she is the existence known as the "Maou", an entity that comes into existence when a "Yuusha" is summoned. The humans of this world think she intends to destroy them all, and thus they send the Yuusha to destroy her. Counter to their belief however, the Maou has no intention to destroy anyone. The Maou has one year to find a solution, and save her own hide. Is this a story about a misunderstood hero, or is it about the rise of the evilest villain?