Prehistoric: the Opening Became Pangu's Cerebellum

Traveling through chaos, Zhang Tiedan discovered that he had an extra big brother, Pangu! And he himself became the most inconspicuous but most closely related organ in the body of the great god Pangu who created the world: the cerebellum! Before Brother Pangu fell, he said: "Tiedan! If I fail, I will leave this wilderness to you! You must guard it for me!" Zhang Tiedan, who was well aware of the dangers of the ancient times, originally wanted to find a place to hide, but unexpectedly, one after another, cause and effect came to his door. Stop pretending, let's show off, my eldest brother Pangu, I have a will. As a result, the painting style of the prehistoric world completely went astray!