This is a world completely polluted by weirdness:
The world is dark, ghosts are eating people, humanity is collapsing, all living things are extinct, and the world is about to die completely.
In order to save itself, the world consciousness forcibly dragged a strong human being from other apocalyptic planes who had a bottom line, but would never be evil and decisive in killing, cast him into a willow tree, and forced him to use his merits to purify the darkness and extend life.