"In a world governed by the Akashic Codex, your Class is your destiny. But what happens when the System rejects you as 'Biological Waste'?"​Kang-Min was born a [Null]—a human without a soul-circuit. Cast out by his prestigious medical clan and betrayed by the woman he saved, he was thrown into the "Deep Gut" to be consumed by failed experiments.​But Kang-Min didn't die. He discovered the System's greatest secret: The Codex is a parasite, and Classes are its leash.​Using a rusted scalpel and a forbidden knowledge of "Anatomical Re-coding," he performs the world's first self-surgery. He doesn't level up; he re-builds. He doesn't learn skills; he steals organs.​“You rely on the System for power? I rely on the System's blood. To you, a God is an idol. To me... a God is just a collection of high-quality spare parts."​Watch as the [God-Butcher] rises, stitching the wings of fallen angels and the hearts of demons onto his own flesh to become the ultimate anomaly.