Only Three Days Left to Live from the Start? I’ll Borrow Some Years from the Demons

Lin Mu, a modern-day corporate drone, transmigrated into this desperate, chaotic world and became a wanted outlaw known as the “Black Constable.” But his start was absurd beyond belief: betrayed by his accomplices, bound hand and foot, and thrown into a ruined shrine to serve as “bait” for demons. Just as he was about to be executed, a cruel, cold System descended: 【Burn your lifespan to gain power. When your lifespan runs out, you die.】 【Current lifespan: 23 years】 From that moment on, Lin Mu's life changed completely. Every crisis forced him to burn through his lifespan to gain immense power and slay demons! But every burst of strength came at the cost of his life rapidly slipping away. He traded demon flesh for lifespan, and lifespan for power. Lin Mu danced on the edge of death, growing stronger with every sacrifice and more ruthless with every kill! Yet as the war against the demons deepened, Lin Mu gradually discovered that the truth of this world was far more terrifying than he had imagined: Why did the demons slaughter without restraint, yet never wipe out humanity? Was the very foundation of martial cultivation in this chaotic world somehow tied to the demons? Behind every demon-slaying operation lurked some secretive deal or conspiracy. And the System's existence seemed more like some kind of “higher-dimensional experiment”… So who was the hunter, and who was the prey? As his fate of burning through his life intertwined with the search for truth, and the slaughter of his blade clashed with the struggle of his humanity, Lin Mu tightened his grip on his saber with a laugh. “If my life is short, then I'll kill until heaven and earth are turned upside down!”