Doomsday Demon System

———— Good people don't live long, and disasters last for thousands of years. In his previous life, he was a good person, but instead he was surrounded and killed by the people he saved. In this life, I have obtained the demon system. I want to do whatever I want and be lawless. Become the dark king in the apocalypse! ———— This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.