Gray Fog and Curse

Traveling through the steampunk world, Levi just wanted to live a better life at first. But the world seems to be having a hard time with him. He was inexplicably rejected in the police examination and was robbed on his way home. In a desperate situation, a black-covered book appeared in Levi's head, providing him with the power called "curse". Under the gray fog, relying on this power, Levi slowly lived a good life, but the price was that he often couldn't live a good life for a few days!