Intro the state just passed a law every school girl gets to have one of the boys as a slave, and the men have to listen to them or they will be publicly executed. (the women are all smarter, stronger, and better at everything than the men, so all of the people in charge in the state are women. They made the men there slaves because they are better than all the men and making them slaves makes them useful) also all the girls also have unique magical powers