The first time Nathaniel split in two, he was seventeen years old.

He didn’t realize it at the time, of course. Back then, it just felt like a headache. A deep, piercing ache that spread from the base of his skull, as if his mind had outgrown the limits of his body and was trying to tear itself free.

The world around him fractured, for just a moment.

It wasn’t hallucination. It wasn’t some fever dream. He could still hear the distant hum of the city, the faint rustling of trees outside his window, the electric buzz of his old ceiling fan. But there was something else layered on top of it. A second reality. A shadow world, just slightly out of sync.

It was like staring at a mathematical proof written in the fabric of existence itself—a logic so perfect, so vast, that his mind could only grasp it in fragments.

For years, Nathaniel dismissed it as a trick of the brain. Overclocked neurons misfiring, nothing more.

Until the day he met the other Nathaniel.

It happened in the middle of an unremarkable afternoon. He was at a rundown café on the outskirts of the city, fingers wrapped around a cup of coffee that had long since gone cold. He had been running calculations in his head, mapping the chaotic fluctuations of the stock market onto prime-number sequences, trying to predict something hidden beneath the noise.

Then he felt it again—the split.

A ripple in the air, a flicker in his vision. And when he looked up, he saw himself.

Sitting across the table.

Same face. Same weary eyes. Same faint scar running along the curve of his jaw—except this version of him had a different energy. More confident. More alive.

The other Nathaniel leaned forward, resting his arms on the table, studying him with quiet amusement.

"You’re not ready yet," he said, voice low and measured.

Nathaniel’s mind reeled, scrambling for logic, for reason—for anything that could explain what he was seeing.

"Not ready for what?" he asked, pulse hammering in his throat.

The other him smiled, but it wasn’t a reassuring expression. It was knowing. As if he had already lived this moment before, in another timeline, another life.

"For what comes next," the other Nathaniel said. "For the day you stop being just one."

Then, just like that, he was gone.

Vanished.

The café around him snapped back into focus, like a rubber band returning to its original state. No one else seemed to have noticed. No one was staring, whispering, reacting. As if nothing had happened.

But Nathaniel knew better.

He wasn’t hallucinating. He wasn’t going insane.

Something was changing.

And for the first time, he wasn’t sure if he was controlling the shift—or if something else was pulling him toward an answer he wasn’t ready to understand.

End of Chapter 1.