There are two opposite sides of the world. Where there is light there is darkness, and where there is yin there is yang. Forever opposite but always connected, let's see how the protagonist who traveled through time as Naruto merges the two opposite sides to create the chaos of the end and the beginning of all things.
If you persist to the end, you will eventually return to the prehistoric world ~ This is a bit of a spoiler
I wonder if technology and cultivation are opposite states?
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.