Pai, a three-eyed Unkara girl with the power of immortality, and Yakumo, a boy who has become her immortal guardian, Mu. 12 years have passed since they risked their lives in the final battle with the God of Destruction, Demon Eye King, and it seemed as if peace had returned to the world. But suddenly, a mysterious incident breaks out at the Sanhara Temple, a negative legacy! At the same time as this chaos, in faraway Tokyo, the story of a boy's downfall is about to begin.