It was one hundred years ago, when the great witch Nebulis turned The Empire into nothing but a sea of flames. The Empire, a militaristic nation and The Country of Witches, The Nebulis Royal Household Agency: the two countries that have been trapped in a never-ending war. Long ago, deep underground the planet, an imperial research unit discovered a type of energy never seen before, and that energy was star spirits. The special attribute of star spirits is that they live in humans; people who have drawn in a star spirit, have a bright birthmark appear on their body. And because of that, they can wield supernatural power, which other people call magic. Of course, the empire started to fear people that hosted star spirits and began to discriminate against them. The oppressed got tired of it and one day started a revolt and so the Great War began. The witch forces, never strong enough, however, among them had the great witch Nebulis, host to the greatest star spirit of them all; she burned the empire in the flames of death. After that, those who were loved by the power of star spirits, decided to start their own country. But this was not the end of the war.
—Scientiiaa