Kang Iseon dies in the modern world and awakens inside his favorite novel—a medieval fantasy standing at the edge of extinction. Reincarnated as a minor noble during the final days of the feudal age, Iseon quickly realizes that this world is about to change forever.

The era of swords, magic guilds, and knightly orders is nearing its end. The old guild system is beginning to collapse, while early machines, black powder, and mass production signal the dawn of an industrial revolution.

At the moment of his rebirth, Iseon awakens a System—one designed not for conquest, but for evolution. The System rewards innovation, organization, and social reform, allowing him to modernize infrastructure, disrupt guild monopolies, and reshape economic power.

As conservative guild masters resist change and nobles cling to fading authority, Iseon moves from the shadows, accelerating progress while preventing total collapse. With knowledge of the novel’s future and the guidance of the System, he becomes the unseen force driving the world into a new age.

In a time where magic fades and machines rise, Kang Iseon stands at the center of history—determined to survive, rewrite the story, and become the architect of a new era.

The last thing Kang Iseon remembered was the sound of rain against his window.


His phone screen glowed faintly in the darkness, displaying the final chapter of The System at the End of the Guild Era. He had reread the novel so many times that he knew every major event by heart the fall of the Iron Guild, the failed rebellion of the mage towers, the first steam engine igniting the world's future.


And the death of its most insignificant character.


"Hah… if I were there," Iseon muttered, eyes heavy, "I wouldn't let it end like that."


That was the first sensation he felt when he opened his eyes again.


A heavy scent of iron, oil, and damp stone filled his lungs. The ceiling above him was unfamiliar wooden beams blackened by age, faintly trembling as if the building itself were breathing.


He tried to sit up, only to feel a wave of dizziness crash over him. Memories not his own poured into his mind like a broken dam.


A noble house in decline.Guild contracts strangling the economy.Magic monopolized by aging elites.A kingdom rotting beneath tradition.


He stumbled to a cracked mirror resting against the wall. Reflected back at him was a boy no older than sixteen, silver-gray eyes staring in disbelief.


The final years of the guild era right before factories rose, before steam drowned magic, before the world burned itself clean in progress.


The air in front of him shimmered, blue light forming words only he could see.


[Age Transition System (A.T.S) Activated][Objective: Guide the world safely into the next era][Failure Condition: Total societal collapse]


In the novel, this period was chaos. Guilds abolished overnight. Nobles executed. Cities starving. Millions dead before the new era stabilized.


[Welcome, Administrator Kang Iseon][The old world is ending.][Will you preserve it… or replace it?]


"If this world is going to change," he said quietly, "then I'll be the one who decides how."


Outside, somewhere in the city, a bell rang the signal of a guild council gathering.


And with it, the first step toward a new era.


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