In the distant future, Cheon Yeo-Woon, the Heavenly Demon, stands at the pinnacle of martial prowess, his body augmented by a 7th-generation Nano Machine.  After a catastrophic malfunction during a time-travel experiment, he is thrust into an unfamiliar world—a realm where swordsmanship and magic reign supreme. 

This new world is dominated by the Runcandel Family, a lineage of legendary swordmasters, and the enigmatic Zipple Family, wielders of potent magic.  Caught in the delicate balance between these two powers, Yeo-Woon must navigate a society where strength dictates one's worth and destiny. 

As he delves deeper into this world, Yeo-Woon encounters Jin Runcandel, the youngest son of the Runcandel patriarch, Chiron.  Jin, once considered a failure due to a debilitating curse, has forged a pact with the God of Shadows, Solderet, granting him unparalleled power.  Their meeting sets off a chain of events that will challenge the very fabric of this world's power structures. 

Amidst political intrigue, ancient secrets, and looming threats, Yeo-Woon must confront his own identity and purpose.  Is he merely a visitor in this world, or has fate intertwined his path with Jin Runcandel's for a greater purpose?

The Time Jet shuddered violently, its metallic frame groaning under the strain of disrupted space-time currents.  Cheon Yeo-Woon gritted his teeth, his hands gripping the control panel as the vessel spiraled uncontrollably. 


"Nano, report! " he commanded, his voice steady despite the chaos.


A moment later, the familiar, calm voice of Nano resonated in his mind. 


"Coordinate setting device damaged. Emergency protocols initiated. "


Yeo-Woon's eyes narrowed.  He had anticipated many outcomes, but this was unforeseen. 


The Time Jet lurched one final time before a blinding light consumed everything. 


When consciousness returned, Yeo-Woon found himself lying on a forest floor, the scent of earth and foliage filling his senses.  The sky above was unfamiliar, with two moons casting a gentle glow. 


"System operating at 62% capacity. Environmental analysis suggests a different world with unique energy signatures. "


Yeo-Woon sat up, his gaze scanning the surroundings.  The flora and fauna were unlike anything he had encountered.  He reached out with his senses, noting the distinct energy patterns in the air. 


As he ventured deeper into the forest, Yeo-Woon encountered a group of travelers beset by bandits.  Without hesitation, he intervened, his martial prowess swiftly dispatching the assailants. 


"Thank you, stranger, " one of the travelers said, bowing deeply.


"A wanderer, " Yeo-Woon replied, his eyes scanning the group.


"You're near the borders of the Runcandel territory, home to the greatest swordmasters. "


Yeo-Woon's interest piqued.  A world dominated by swordmasters?  Perhaps this detour held potential. 


Over the following days, Yeo-Woon immersed himself in this new world's culture, learning about its power structures and key players.  The name Jin Runcandel surfaced repeatedly—a prodigious swordsman with a mysterious past. 


"Nano, begin compiling data on Jin Runcandel and the Runcandel clan. "


Yeo-Woon's journey in this unfamiliar world had just begun, but he was determined to carve his path, as he had always done. 


The Demon Lord's Descent.