In this world where no one can escape birth, old age, illness, and death, there was once a legend about the immortal demon god. Within a few years of his birth, he killed the entire world and almost turned into a river of blood. Even if hundreds of people besieged him and his cunning hidden weapons were revealed to his inner circle, his offensive could not be stopped. For a while, everyone was in danger, and then disappeared from the world for unknown reasons. Twenty years after the immortal demon god disappeared, the world seems to be experiencing turbulence again... - Original, probably no CP, the place names, country names, etc. In the article are all fabricated, please do not take the blame.