Weak Janitor? What About the Cosmic Cleaner?

Transmigrator Li Manyi thought he'd hit the jackpot in another world—until the heavens branded him a bug and forced him into the lowliest job: janitor. But when he activates his hidden cheat skill, "Ultimate Ascension," everything changes. Now wielding the universe's only legendary class—Universal Cleaner—he ascends from scrubbing floors to purging entire realms. Centuries later, countless beings revere him as a saint. Yet as the aura of billions of slain lives swirls around him, Li Manyi can only insist with a straight face: "I'm actually a good guy."