At the beginning of ancient times, who preached it? What else is there outside of Kyushu? "The Classic of Mountains and Seas" is not a myth, but a history book that has been dusted by time. Most of the rare and exotic beasts recorded in it are "shapeshifters", hiding in the shadow of modern society.
Human society has signed the "Treaty of Coexistence between Humans and Demons" with the shapeshifters for more than a thousand years. However, the extreme human organization "Pure World Society" has always believed that "those who are not from our species must have different minds" and secretly hunts and kills these ancient remnants. The "Book Keepers", composed of shapeshifters and psychic humans, guard the truth of "The Classic of Mountains and Seas" and maintain this fragile balance.
Until today, a human professor who studies folklore met a mythical beast who claimed to be from "The Classic of Mountains and Seas". This secret war that lasted for three thousand years finally revealed the tip of the iceberg...
