It's so Hard to Be the Devil!

Li Ye is the newly appointed demon king of the Lunar Eclipse Kingdom. He has the magical power to destroy the world, but he is tortured by the mess left by his father and wants to resign every day - the army is in arrears with military pay, the ministers are obsessed with gossip, and the commander of the forbidden army is a middle-aged man. It wasn't until the Wuye Kingdom's envoy died mysteriously in a side hall of the palace that he discovered that such a huge demonic realm could not find a single criminal investigation talent. Therefore, Li Ye decided to go to the human world in person to learn what "ruling the country according to law" means, what "teaching students in accordance with their aptitude" means, what "adapting measures to local conditions" means, what "people-oriented" means...