The twenty-first century AD, one thousand seven hundred years after the Holy War. Metal, wood, water, fire, earth, spirit. The boundaries of the six realms guarding the demon world are broken, and monsters invade the six realms, threatening the peace of the six realms. The sleeping power of the Holy War has reawakened and resides in the bodies of the supernatural walkers who have traveled through the six realms. In this world, the guardian beasts created by gathering the power of heaven and earth were actually two pure colors, black and white. The world is in turmoil, and monsters are rampant.