Save The World With Ghosts

In 9999 AD, there were three dimensions in the world: the material layer, the spatial layer, and the soul layer. The material layer is composed of living people; The spatial layer, also known as the cultivation layer, is home to extraordinary cultivators above the material layer, who have a longer lifespan than ordinary people; The soul layer is at the innermost of these three, filled with the souls of deceased people, both good and bad, dead humans, and other living beings.The Spirit Binding Alliance spans three levels and saves the world with a cute ghost.