This is a world of swords and magic. Humanity fought among itself for hundreds of years, until one day the beings who called themselves the Creators, the gods, delivered their punishment! A million monsters flooded the land, thirteen nations were crushed in an instant, and only five percent of the world's population remained. The surviving humans had no choice but to seek refuge in the far north of Earth, in the Canadian Forest, where they could survive. They built fifty-meter-high walls to defend against the monsters' invasion. Then, a hundred years later, the male protagonist was born...