Demon King's Part-Time Job

The half-step demon king, the Great Demon King, finished his retreat in the Spring and Autumn Period, and originally wanted to go out and open a bookstore to fill his time. But when he came down the mountain, he found that the world had changed. What the hell is coffee essence? One breath can keep people awake for half a month! How did the gantry crane become a spirit? This thing can also turn into a dragon? Can a co-author with a dragon in his name turn into a dragon? Wait a minute, what is a satellite essence? What happened to the aircraft carrier spirit? Modern society is too strange!