What Should I Do If My Secret Identity Is a World-Destroying Boss?

[Updates are irregular and follow the rankings. Let it build up before reading.] In 3696 AD, several regional space-disappearance incidents occurred around the world. Schools, residential districts, streets, parks, and every living thing within them vanished inexplicably, leaving only enormous, pitch-black pits. They were void worlds hidden within the rifts in space and time. Everything collapsed and disintegrated, twisted into chaos, and was ultimately devoured. Ascension, dimensional descent, collapse, deconstruction, reconstruction. A mysterious existence greedily unleashed calamities upon the world. Only the final Chosen One could save the world as it teetered on the brink of ruin. The reborn ones from the future solemnly and confidently reported the savior’s existence to the nation, fervently calling him: The Golden-Blooded Key, the Eternal Guiding Beacon, the Gatekeeper of the Fictional False World, the Supreme One Above Reality, the Sword of Judgment That Severs the Void: Mu Baisheng. * Mu Baisheng, pulling an all-nighter to catch up on his holiday homework, sneezed violently. After staring blankly for three seconds, he immediately tossed aside his pen and went to bed. His life had always been plain and uneventful, and he thought everything would continue to go smoothly. Yet somehow, strange people began arriving from all over the world, excitedly and joyfully calling him “Chosen One,” “Eternal Guide,” and other such things... Later, when he was forced to enter a void world, a voice echoed in his mind. [Congratulations, you have ascended to the rank of Overseer.] [Opening your Path. The thirteenth Path, Fate, has been successfully unlocked.] [Please note: you must not violate the following three rules.] [One: Do not take part of your own accord in any event involving lower-ranked life forms in the Void World.] [Two: Do not engage in wanton slaughter with life forms of equal rank.] [Three: Do not worship gods.] [Finally, the Void World has a friendly reminder: Before Red Moon Day arrives, please eliminate all life forms in your assigned region.] [Welcome to District Thirteen, Mr. Overseer.] [You will become the final darkness of the human world.] Mu Baisheng, expressionless: ... Sorry, I’m past my chuunibyou phase. 1. The worldbuilding is original. Any resemblance is purely coincidental. 2. No romance, friendship-focused. The male lead is chaotic good and develops over time. 3. Not a mindless power fantasy. Theme: Believe in yourself