The autonomous city of Ainz territory thrives on advanced magic and sorcery. The one who broke the peace was a beautiful young man with one eye, one arm, one leg, and a strange appearance: Ains Silvettas, the legendary sorcerer who laid the foundation for everything 2000 years ago! Time passed while he took refuge in a cabin in the woods, and when he got stuck in his research and went outside, he discovered that his "notes" had become a "grimoire," now considered to be a bible, and that he himself had become revered as a "Demon God." Unaware of this, he embarks on a journey of magical research, following his curiosity. By touching the truth of the world, he unknowingly destroys the balance of the nations! An easygoing fantasy about a carefree and powerful Demon God!