On the rooftop of the skyscraper stood a young man, cutting a striking figure against the fading light. His black hair, tousled by the wind, fell just above his eyes, which were a deep, enigmatic shade of black that seemed to hold countless secrets.

His skin was light, contrasting sharply with his dark hair and eyes, giving him an almost ethereal quality. The winds whispered around him, carrying the distant sounds of preparations for war. From his vantage point, he could see the expanse of the battlefield below, where three mighty factions were gathering.

His eyes, sharpened by the trials of this world, took in the scene with a mixture of detachment and nostalgia.

The Earth Guardian force known as the Earth Vanguard was a sight to behold. Thousands of soldiers, clad in gleaming armor, stood in disciplined and orderly formations, a testament to their rigorous training and unwavering resolve.

Their banners, emblazoned with the emblem of the Earth Alliance—a radiant sun encircled by a wreath of laurel—fluttered in the breeze, casting an aura of hope and determination. The ground beneath them seemed to hum with a quiet strength, the very earth lending its power to those who swore to protect it.

At the head of their army stood Ichinose Rin, her commanding presence impossible to ignore. Her beauty was striking, even from this distance, and her aura of authority was palpable. The young man's mind wandered back to the days when they were inseparable, childhood friends in a simpler world.

Opposite the Earth Vanguard, the Demon Alliance amassed their dark forces in a display of sheer, unbridled power. The air around them seemed to shimmer with malevolence, the power of their dark magic almost tangible.

Their ranks were a twisted assembly of fearsome creatures—demons with glowing eyes and wicked claws, sorcerers shrouded in shadows, and monstrous behemoths that towered over the battlefield.

Their banners, adorned with a blood-red sigil of a clawed hand gripping a shattered world, flapped menacingly in the wind, exuding an aura of dread and destruction. At their forefront was the Demon King, a towering figure exuding a sinister aura.

His presence alone was enough to send shivers down the spines of even the bravest warriors.

Between these two forces stood the Outcasts, a group of former geniuses and oppressed individuals from various clans belonging to the Earth Alliance.

Their encampment was less orderly, yet it thrummed with a fierce, rebellious energy. These were the marginalized talents, the prodigies who had been cast aside, now united under a single banner.

Their leader, always masked, exuded a mysterious aura. With valiant leadership, he had united these marginalized talents into a formidable force, their resentment and desire for recognition fueling their resolve.

Their emblem, a phoenix rising from ashes, symbolized their unyielding spirit and determination to carve out their place in a world that had cast them aside.

As the young man observed the three armies, memories of the day his destiny changed flooded his mind. It had started like any other day. He was living a mundane life, dealing with the trivialities of existence on the Earth. That night, he had gone to bed, expecting nothing more than the usual cycle of dreams and reality.

But when he woke up, everything was different.

The pain was the first thing he noticed—a splitting headache that felt like his skull was being torn apart. He clutched his head, groaning, and tried to open his eyes. The world around him was blurry, and his mind was filled with unfamiliar images and sensations.

He saw a different Earth, one that was vibrant and teeming with magic, a stark contrast to the mundane life he knew.

As the pain subsided, he realized that he had memories that shouldn't be there. Memories of a life he had never lived, of places he had never seen, and of people he had never met—yet felt an inexplicable connection to.

His confusion was overwhelming. Had he dreamt it all? Was this some elaborate hallucination? But the memories were too vivid, too real. He could recall the feeling of magic coursing through his veins, the weight of a sword in his hand, the camaraderie of friends who were now just figments of his past.

It was then that he began to understand. He had been transported to another realm, one where magic was real and the stakes were infinitely higher. His former life on the Earth seemed like a distant dream compared to the vivid reality he now faced.

He remembered the moment he first harnessed the magical energy that permeated this world. It was as if the power had always been there, lying dormant within him, waiting for the right moment to awaken.

He also recalled meeting Rin in this new world, their reunion bittersweet. She had grown into a formidable leader, far removed from the carefree girl he had known. Their paths had diverged, yet their bond remained, a thread connecting their pasts to the uncertain future that lay ahead.

Now, as he stood on the precipice of a battle that would shape the future of this world, the young man felt a sense of inevitability. He had been thrust into a destiny he never asked for, yet it was one he couldn't turn away from. The Earth Vanguard, the Demon Alliance, and the Outcasts each had their own reasons for fighting, but for the young man, the battle was deeply personal.

He looked down at the armies once more. Ichinose Rin, his childhood friend and the leader of the Earth Vanguard, stood ready to defend their world. The Demon King, a harbinger of destruction, sought to claim it for his own. And the masked and enigmatic man led the Outcasts in a fight for recognition.

As the first horns sounded, signaling the start of the confrontation, Cruzer's grip tightened on his sword. He was not just a spectator in this war; he was a catalyst, a key player whose actions could tip the balance. The time for reflection was over. It was time to embrace his destiny.

For he was Cruzer, the realmwalker with memories from many lives but only a single existence thorughout the many worlds and realms.