It all began on an ordinary day, when the fabric of reality itself was torn open. A duengun—a mysterious rift—appeared out of nowhere in the heart of Seoul, and from it, a monstrous creature emerged, setting the world on a path of destruction. Humanity plunged into chaos as society crumbled under the weight of the threat, but amidst the darkness, a single ray of hope emerged in the form of the Hero. With the arrival of the Hero and others like them, the tide began to turn. Slowly, the world regained some semblance of stability.

This cataclysmic event reshaped the vision of humanity overnight. New governments formed, and the power structures of the old world dissolved. Those who once ruled from the heights of society now scrambled to maintain their dominance in this new and unpredictable world, while those at the bottom, who had once been invisible, saw a glimmer of hope—a chance to rise above their former limitations.

Fifteen years later...

I am Jae-Hyun, a 32-year-old man living in a cramped, dimly-lit apartment. My life is a blur of uncertainties, for I have no memories of the 17 years that came before the day the duengun appeared. That day, I lost everything—the person I once was, the life I once lived. Time has passed, but the void in my mind remains. Fifteen years since the incident, and I still don't know who I was before the world changed.

In the aftermath of the duengun event, the government categorized all heroes based on their power levels, ranking them from EX-class to F-class. My dream had always been to become the strongest hero, but when the test results came in, my hopes shattered. I was ranked F-class—a failure in a world that worshipped strength. Worse still, my unique skill remained unknown, its potential a mystery that left me powerless and with no way to make a living. With mounting debts and nothing to offer, I accepted a job from my old friend—one that no hero would normally consider. I became a porter, tasked with extracting resources from the monsters slain in the duengun alongside the heroes.

But on that fateful day, something unprecedented happened—a turn of events that would change my life forever.