Demon King, How Did You Become a Hero?

"Lord Qishen Cult Leader! Our plan to become a god by sacrificing the lives of all races is about to be defeated by the brave! He is right outside the door and said he wants to challenge you!" "Ah? Where did the brave man come from? Who is he?" "He is a brave man from the demon world. He is the demon king Jiang Yesun who unified the demon world five hundred years ago!" After five hundred years of ups and downs, the demon king Jiang Yesun unified the demon world to put an end to the war. Not a few days after he retired to the countryside, the leader of Qishen came to find trouble for him. Could it be that the prosperous age that he had worked so hard to build had such an ending? The Demon King strikes again as a hero! Can he still have the victory that the autumn wind swept away the fallen leaves?