Custom Cheats: The Myriad Worlds Are My Clients

[PS: If the early mysteries are too confusing, start reading from Chapter 47.]

♡ The protagonist doesn't create worlds himself. Instead, he becomes a "golden finger wholesaler," installing cheats for problem children in various small worlds and letting them stir up trouble, while he secretly collects the world's origin essence as payment. ♡

Gu Mo's job is to give "cheats" to the Chosen Ones of worlds on the brink of destruction. And so, the style of the Myriad Worlds suddenly takes a bizarre turn: on the anti-Japanese battlefield, one unit's equipment grows more advanced with every fight, until they even deploy a Gundam; in the cultivation world, a good-for-nothing young master can cultivate without any insight, just burning lifespan to add points to his Deep Blue stats; at the magic academy, an underachiever casually fires off one forbidden spell after another, leaving the dean utterly baffled... As these cheat-wielding clients begin steamrolling their worlds and dishing out face-slapping, the biggest winner is Gu Mo, quietly collecting rent behind the scenes.

Until one day, the clients realize that everyone's System seems to come from the same "manufacturer"?