Beast Pet Shop System: My SSS-Rank Slime Devours the Heavens

Two hundred years ago, a colossal dimensional rift shattered the skies above Earth, flooding the world with endless Spiritual Qi. Civilization collapsed within months. Humanity only survived the resulting monster tides and mutating creatures by mastering martial arts, spiritual cultivation, and the most crucial art of all: Beast Taming.
Following his death, Kai Ashford awakens in this ruthless new era inside the body of a seventeen-year-old orphan. He inherits nothing but a bankrupt Spirit Beast Pet Shop, crippling debt, and a chorus of mockery from the local tamers. He has no powerful backing, no wealthy customers, and his only contracted beast is a Level 1 Blue Water Slime-widely considered the weakest, most useless creature in existence.
Just as his situation seems hopeless, he awakens the Supreme Beast Shop System, accompanied by Astra, a highly intelligent and unwaveringly loyal system avatar. With her analytical guidance, Kai discovers a world-shattering secret: his pathetic, squishy slime harbors a hidden Sovereign-tier bloodline and the terrifying SSS-Rank talent, "Devour."
But ruling the world doesn't happen overnight. To survive, Kai must start from the very bottom. Navigating a cutthroat economy, he must hunt for overlooked materials, outsmart arrogant nobles, and meticulously guide his slime through hidden evolution paths. Step by grueling step, Kai will build a legendary business empire, turning the weakest beast in history into the Primordial Devouring Ocean King Slime-a creature destined to swallow dragons, consume gods, and devour the heavens.