Kaigara is the land of Sheru, who empowered nature spirits to become lesser gods called the Kodomo. After eons of peace, Sheru split into Yokubo and Kurai. For a time there existed harmony between the two gods, but eventually disagreement spiraled into war. The Kodomo chose their sides. The physical bodies of Yokubo and Kurai shattered, destroying mountains and breaking the continent in half as they did so. They remain in spiritual nature, but can no longer manifest in physical form. The Kodomo remain in the world, living among the mortal races.