Cain.

Cain lived a perfectly normal life on Original Existence, the modern Earth. Nothing about his life stood out, except for his immense confidence. He was a teenager who believed he could overcome anything, as long as he stayed true to his ideal of being the main character of his own story. Cain was the kind of guy who loved reading manga, especially fantasy and isekai genres. He'd often joke about how he was ready to be summoned to another world, wielding powerful magic and going on grand adventures—just like the heroes in the stories he read.

But, unlike the heroes of the manga he adored, Cain had no special skills or extraordinary abilities. He was just a regular teen with a love for adventure stories and a knack for getting into trouble, mostly from his tendency to act impulsively. His friends always saw him as overconfident, too self-assured for his own good, but Cain didn't mind. He was convinced that one day, he'd find himself in a situation where his overconfidence would be rewarded.

He didn't know it at the time, but that day was coming.

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One evening, after a typical day of school and manga reading, Cain was heading home, his mind drifting to another daydream about being transported to a magical world. He often imagined how cool it would be to be summoned by a goddess, gain magic, and become the hero of the story. What he didn't expect was that the world he had dreamed about would become his reality.

Suddenly, as he walked down the familiar street, the world around him shifted. The ground trembled, and the sky darkened in a surreal way. Before he could process what was happening, the air seemed to crackle with energy. The next thing Cain knew, he was engulfed by a blinding light. His body felt weightless, and then everything went dark.

When Cain regained consciousness, he found himself in a strange land—Fatal Existence. The environment was nothing like the modern world he knew. It was a twisted, dilapidated version of what could only be described as a medieval fantasy world. Ruins scattered the landscape, and a dark energy permeated the air. What shocked him more was that he wasn't alone—he had magic. His dream had come true in the most unexpected way.

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In Fatal Existence, Cain was no longer the same person he had been on Earth. He had powers—real magic, not the fictional stuff from his manga. The world he now found himself in was wild and dangerous, but Cain's overconfidence didn't waver. He assumed he would handle it just like the protagonists of his favorite manga: with ease, determination, and a bit of reckless optimism. After all, this world was practically made for heroes like him, right?

At first, Cain's overconfidence led him to underestimate the dangers around him. He quickly learned that magic wasn't just a tool for adventure—it was a tool for survival. He was forced to fight, adapt, and survive in a world that was far more complex and dangerous than he ever imagined.

But Cain wasn't alone. He soon met other individuals, some of whom had been brought to this world just like him. Ryuta, Skyler, and the others. They were his first real allies in this strange new world, and together, they formed a bond, working to understand the magic of Fatal Existence and uncover the mysteries behind it.

As Cain's journey progressed, he began to realize that his once-unshakeable confidence was both a strength and a flaw. There were moments where his arrogance nearly cost him his life, but with each trial, he became stronger and more capable. He was no longer just a guy who read stories—he was living one, and the stakes were real.

His ultimate goal? To not only survive in this world but to conquer it. And who knows? Maybe even rebuild it into the world of his dreams, just like the heroes in the manga he always read. He might not have known how or why he was brought here, but Cain wasn't going to waste this chance. He had a destiny to fulfill.