There is something called a "book" in Yokohama. It is a blank book, and anything you write on it can become a reality. There are countless parallel worlds in the "book".
One day the "book" was separated into two parts, and the core was separated and merged with a newborn child.
So this child with "book" has had super powers since he was a child and knows more than others.
But a "book" without a core will have no effect even if anything is written on it, so a core is needed for this.
So the war around this child is about to begin.
Purpose: Darkness is everywhere in this world, we must learn to look forward