I am a demon king as well as a hero

Read manhua I am a demon king as well as a hero:

Li Chen’s life ended due to a false accusation, but what if there’s still life left to live? Unexpectedly, the person who was meant to be a hero was reborn as the 13th demon king. Hey! Is this thing really serious? The administration of that mad goddess must be insane! Permit me to come back! How come? We have an obedient elf, goblin, or fairy, and a cute and pure chick. Maybe that’s not as horrible as it looks, hmm. But what does it mean to me to save the world? Isn’t this what the demon king and the hero should be worried about?Whoa, I forgot I was the demon king (fearful expression).