Most people in the world are afraid of "ghosts", but they don't know that in the eyes of "spirits", people are the most terrifying.
There is a saying that "all things are born to nourish people", which is the thought of many "spirits" towards people. It seems that everything in this world is dominated by people. They are both afraid of humans and eager to become humans themselves.
As a result, various methods of becoming humans were gradually developed among them.
However, some human beings, intentionally or unintentionally, make themselves no longer human and gradually lose the fundamentals of being human...
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We solemnly declare that this story is purely fictitious and any similarity is strictly coincidental.
There are references to ancient books in the book, such as the names and appearances of some ghosts and monsters, but it is not a reproduction or a re-description of ancient mythology - I am not yet capable of this. It's just a reference to inspire inspiration. If you find something inconsistent with what you know, it's completely normal. Because it was not copied directly. So there's no need to complain about it, it won't change anyway.