Undercover in the Demon Sect, and I'm About to Become Its Leader

“Holy Lord, aren't you going to call it off? I'm about to become the Demon Sect's leader!” “Call it off? You wiped out my entire Holy Land. What the hell am I supposed to call off?” [Xianxia + System + undercover agent + lighthearted comedy + one or multiple heroines (?)] Ye Yun transmigrates and becomes an undercover agent in the Demon Sect. To maintain his image as a Demon Sect disciple, he acts outrageously... He “beats up” the enforcement goddess who cultivates the merciless path... He “punishes” the mysterious witch... He starts a gang, establishes a faction, and extorts protection money... Many years later. Ye Yun stands at the peak of the continent, with countless followers at his feet. He rubs his forehead and laughs bitterly. “How did I end up becoming the Demon Sect's leader while undercover?”