We Agreed to Be the Devil, but What the Hell Is an Industrial Empire?

The Demon King has been eliminated by the brave, and the Demon King's city has become a ruin. Where should the son of the Demon King go after traveling through time? Hovey sat on the throne and kept thinking about this problem. Now that things have come to this, we can only take one step at a time... When the territory became active again, the guild issued a novice mission: deal with the remaining remnants of the Demon King. Many adventurers sneered and dismissed it. When white smoke billowed out of the territory, the guild issued a diamond mission: to investigate the cause of the white smoke in the Demon King's City. Some adventurers are confident that the brave man will defeat the Demon King again. Until the roar of machines shattered the aristocratic class, smooth roads brought goods from distant places to everyone, and poor people could enjoy cheap bread. Only then did they realize that the Demon King's rule had quietly spread throughout the world. "What a devil, that's just a brave man with horns!" ——— [Mixture of Different Worlds] [Farming Articles] [Infrastructure]