The Autonomous City of Ains Territory prospers through highly advanced sorcery and magic. The one who once shattered its peace was a young man with a beautiful yet bizarre appearance, having only one eye, one arm, and one leg. It was none other than the legendary sorcerer Eins Silvetas, who built the foundation for everything two thousand years ago!

While he was holed up in his forest cabin, time continued to flow. When he hit a dead end in his research and finally stepped outside, he discovered that his "scribbled notes" were now treated as a holy bible known as the "Grimoire," and he was being worshipped as a "Demon God". Unaware of his status, he sets out on a journey to explore sorcery, simply following his own curiosity. Touching upon the laws of the world, he unknowingly shatters the balance between nations!