Supreme Demon Lord, You Want Me to Become the Head of Mount Shu?

Wei Yu transmigrates into a fantasy world and grows up on Mount Shu. On the day of his coming-of-age ceremony, he binds to the Supreme Demon System. As long as he keeps doing evil, Wei Yu can improve his cultivation, become the Supreme Demon, ascend in broad daylight, and hopefully find a way home. So, to get home, Wei Yu goes on a spree of villainy! But every time Wei Yu claims a System reward for his misdeeds, the outcome gets turned on its head, and his blunders end up making Mount Shu even stronger! As events unfold, Wei Yu discovers that he is actually the Demon Venerable's third incarnation! Meanwhile, Mount Shu, the leader of the righteous sects, becomes more and more peculiar. Wei Yu: What?! I'm the Supreme Demon, so why are you making me the leader of Mount Shu?