Tokiiro no Matsuei

"Once upon a time the world was chaotic state. Those who had special abilities were born in chaos. Some of them helped human being, gave a guidance to people, and were revered as god. Others gave destructions and disasters, and were feared as devils. But what were born in chaos were not only god and devil, also Shinma, which had a figure of a god and a heart of a devil. And Shinma were feared as conductors of confusion. YamataNoOrochi,the king of Shinma, demanded sacrifices(maidens) from people, but was beaten by Susanoo. As a result Shinma were shut up under the ground, and lost their ability. However, Shinma is reviving now."

[From Anime Densetsu]