Every one million years in hell, a shikigami created as a defective product will appear. And Honglian happened to be the defective product that was inspected. Some of the defective products that appeared in the 1 million years of hell were destroyed, while others were exiled to the human world without being summoned by the master. The premise is that the memory is erased. In other words, apart from talking, a shikigami only knows that he is a shikigami. Guren, on the other hand, was a defective product because he was too similar to a human being and could not cast spells like ordinary shikigami. He was exiled to a world where Onmyoji did not exist - the world of the Net King.