I Am a Demon Cultivator, Why Should I Save the World?

In the border town "Ash Town", which is rainy and muddy all year round, the little beggar's life goal in the early morning hours is so simple that he only has two words left: to survive. Until he met a small black flag embroidered with strange runes that whimpered in the middle of the night. "The eyes of the underworld are opened, and the dirty earth is reborn... Boy, you are not the only one who has disturbed the things in the tomb." Rise in adversity, survive in the treacherous environment, and fight against fate. Watch how the little beggar holds the soul-eating flag in the early morning, and explores the truth of reincarnation on the thorny immortal road. Will he eventually turn against his fate and become a demon, or will he become an immortal?