A tainted alternate universe, a bond with maidens, and the birth of Star Children. The fate of the world is... Impurities have invaded the magical world of Granvania. Summoned from Earth (known to Granvanians as Sora), Yuge Itsuki is called to exorcize the Impurities across the land. With the help of the 12 Star Maidens, he is able to create Star Children that will help combat the darkness plaguing Granvania. "To fulfill the mission, please conceive my child!"