The faint hum of city life was barely audible as Kairos Valtieri sat on the edge of his bed, staring out of his bedroom window at the familiar streets below. His life had been anything but ordinary, but lately, it had been… quiet. His parents had abandoned him years ago, leaving him with nothing but memories and a dusty inheritance. The house that had once belonged to his grandfather now felt like a hollow shell, filled with shadows of the past.

Kairos' grandfather had been a man of quiet wisdom, a scholar who had taught him the value of knowledge, discipline, and patience. But after the old man's death six months ago, the house had become a place of solitude. Kairos wasn't exactly complaining—his grandfather had taken him in after the tragic death of his parents when he was just six years old. But now, it was just him in the large, ancient house, surrounded by relics of the past that held little meaning to him. The only company he had was the occasional call from his distant relatives, but even that had stopped recently.

"Another day, another lonely evening," Kairos muttered to himself, slouching back against the bed, a worn-out textbook resting on his lap. His fingers lazily traced the pages, but his mind wasn't on schoolwork. The high school senior had long stopped caring about his grades or the future. It was all a blur of monotony.

But that evening, something would change.

As the sun dipped below the horizon, Kairos heard an odd noise—a soft creaking from somewhere deep within the house. He glanced toward the source: the grand hallway leading toward his grandfather's study, a part of the house that had been untouched since the old man's death. Despite the long years of living in this place, there had always been something unsettling about that room. His grandfather had told him never to go near it, but curiosity had always gnawed at the back of his mind.

Tonight, that curiosity got the best of him. Kairos tossed his textbook aside, stood up, and walked toward the study. His steps echoed eerily through the empty halls. He had never been one for adventure, but something about the mystery of the room called to him.

The door to the study creaked open as he pushed it. A low, dusty smell greeted him, thick with the scent of old paper and leather. The room was exactly as he remembered it: bookshelves lining the walls, scattered notes from his grandfather's research, and strange artifacts arranged carefully on a wooden table. But something was different tonight.

There, in the far corner of the room, a part of the wall seemed… odd. The edges of a wooden panel jutted out slightly from the rest of the wall, almost as if it had been deliberately hidden.

Kairos' heart quickened as he approached the panel, his hand brushing against the wood. It felt cool to the touch. He gently pushed against it, and with a soft grinding noise, the panel slid open, revealing a hidden compartment. Inside was a small, ornate box, shimmering in the dim light. It was unlike anything he had ever seen—a relic, ancient and strange, covered in faint markings and symbols he didn't recognize.

Without thinking, Kairos reached inside and picked up the box. It felt heavy in his hands, as though it was imbued with some kind of power. The moment his fingers brushed against the surface, an electric jolt shot up his arm, sending a wave of warmth and energy coursing through his body.

He stumbled back, nearly dropping the box, but something inside him urged him to hold on. The world around him seemed to blur as a strange force enveloped him, filling his mind with fragmented images and voices that he couldn't quite understand. The symbols on the box began to glow with a soft, ethereal light, and a deep, resonant voice echoed in his head.

"The chosen shall rise. The reckoning begins. Prepare for evolution."

Kairos' breath caught in his throat, the words unfamiliar yet somehow familiar. His heart raced. What had just happened? He glanced down at the box, now pulsing with a strange, warm glow, before suddenly, the light shot upward, enveloping him in a blinding flash.

When the light faded, he was on his knees, his body trembling. His mind was buzzing with new knowledge—his senses sharper, his thoughts clearer. He could feel something different inside him, something powerful. The world around him seemed more vibrant, more alive, as though he had awakened from a long, dreamless slumber.

Kairos stood slowly, his body feeling strangely light. He could feel an unfamiliar energy flowing through him, like a stream of raw power waiting to be harnessed. He glanced at his hands, and to his shock, they looked different—stronger, more defined. His body felt as if it had been reshaped overnight, every muscle, every fiber of his being pulsing with newfound strength.

"Wh-what is this?" he whispered to himself, his voice unsteady.

The voice in his head returned, calm and authoritative.

"You have unlocked the Celestial System. Your journey has begun. Level One: The Evolution Path."

Kairos' heart skipped a beat. The Celestial System?

Before he could process the words, a holographic screen materialized in front of him, glowing with vibrant symbols and stats.

---

Name: Kairos Valtieri

Level: 1

HP: 100/100

MP: 50/50

Strength: 5

Agility: 5

Intelligence: 5

Skills:

[Passive] Evolutionary Adaptation (Unlocks new abilities as you level up)

[Active] Unpredictable Strike (An evolving attack with a random effect)

[Active] Celestial Resonance (Connects with cosmic forces to temporarily boost abilities)

---

A rush of energy coursed through him, and Kairos couldn't suppress the overwhelming urge to test out his new strength. He clenched his fist, and with a sudden surge of power, a nearby book flew off the shelf and into the wall, leaving a small dent.

He stared at the screen, still in disbelief. This was real. His body was changing. He was changing.

Before he could fully process what had just occurred, his phone buzzed in his pocket. It was a message from a girl he'd never met, yet her name was familiar.

Selene Ashford: "Kairos, are you alright? I… I saw what happened at the store earlier. You saved me. I don't know who you are, but we need to talk."

Kairos paused, his mind reeling. Who was this girl? What did she know about what had just happened?

But there was no time to think. His world had just been flipped upside down, and the journey ahead was about to begin.