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There was a mysterious old man who presented the 'One Hundred Million Year Button' to a swordsman who had flunked out of the sword academy. A magic button that, when pressed, grants the same effect as a hundred million years of training. The failed swordsman, pressing the button with a mix of skepticism, instantly felt an immense power awaken within him. He gleefully pressed the button repeatedly—he couldn't stop himself.

It was a cursed button. The moment he pressed it, he was trapped in a 'prison of time' for one hundred million years. He spent the first hundred years seeing it as an opportunity, pouring himself into training. A millennium later, he no longer knew why he wielded a sword. By the time ten thousand years had passed, he had stopped thinking altogether.

One hundred million years later, having become virtually a shell of a person, he finally returned to the real world. All memories of his one hundred million years vanished, leaving only his refined swordsmanship. Mistakenly believing, "I can get strong just by pressing the button!?" he repeatedly pressed the One Hundred Million Year Button, each time cursing his own foolishness. As he continued to loop through these hellish one hundred million years, he realized something.

"What if I could cut through this very world and break free...?"

Several hundred million years later, he "cut through" the prison of time and escaped the one hundred million year loop.

This is the tale of a swordsman who flunked out of the sword academy, clearing his disgraced name with ultimate sword techniques and making his legend known throughout the world.