“You have been selected by the Primordial Beast Code.”
Kazuki Ren, a dying high school dropout with a mysterious pendant, is unexpectedly summoned to the continent of Aetherion, a world ruled by spirit beasts, cultivation, and ancient bloodlines. But he’s not alone. Armed with the Beast Sovereign System, Ren can tame, evolve, and fuse with beasts beyond imagination.
From raising a trash-tier cub to commanding a divine phoenix-dragon hybrid, Ren's path to dominion is anything but ordinary. Betrayals, ancient secrets, and beast tides threaten to crush him—but with his wits, willpower, and system... he’ll rise.
Because in Aetherion, only the strongest beast cultivator survives.