The Reincarnated Demon King Starts Undercover to Catch the Demon Boss

Li Mu, who traveled to the Demon Catching Division, wanted to escape from this ghost place on the first day. Demon, demon, evil spirit. This world is too scary, I just want to be a salty fish in peace. What? Am I actually the strongest demon king in this world? Are you still undercover in the Monster Catching Division? Sorry, it still can't stop me from going down. Is it okay for me to just eat and wait for death, and stay passive until I retire? The cruel reality told Li Mu, no.