Have you ever thought about how the world exists?
Does external matter really exist outside of our consciousness? Or is it just an illusion created by our brains?

【Story plot】
After his sister Mingyue disappeared tomorrow, the boy came to a world that belonged entirely to books.
At this time, a talking cat descended from the sky, claiming to be the defender of the world of books, and could lead tomorrow to find the bright moon.
However, changes began to occur one after another in the world of books. One person and one cat were trapped in the world of books, jumping between different stories.
After solving each puzzle, can the story come to an end?