Summary: Nothing much was expected of Uchiha Sasuke. Known as Itachi the Prodigy's little brother, Sasuke was just, in the villagers' eyes, a normal Uchiha boy. Little did they know that Sasuke was one of the only fighters left to defend the human existence against the deadly Underworld.

Disclaimer: The Naruto characters do not belong to me. Everything else does.

Author's Note: Sorry for the continual and frequent changes. I haven't looked at the plotline in a while, and when I did, I decided to change a few things.

Prologue

It started when he was two.

A man, appearing to be about thirty, was hovering just slightly above the ground in his house.

He should have taken the hint.

Instead, he grabbed the intruder's hand and pulled him toward his brother's room. After all, who else could take care of this?

The boy's footsteps pattered down the hall.

Uchiha Sasuke burst into his brother's room.

Jolted out of his thoughts, Itachi gave Sasuke a curious glance, then shrugged and began turning away. It was probably just another of Sasuke's requests for his beloved nii-san (Author's Note: I hope I used the right form/spelling) to train with him.

Sasuke beamed at Itachi. "Thisguywassneakingaroundourhomeandicaughthim!" The two-year old pronounced, all in one breath.

Itachi was thrown back in surprise. Of all the things to say, he never suspected Sasuke would say something like that.

Narrowing his eyes, Itachi glanced around. He hadn't noticed anybody. Frowning, Itachi turned on his sharingan.

Still no sign of anyone.

"Where is this person?" Itachi asked.

Sasuke blinked in confusion. A startling thought started to form in his mind.

'Nii-san can't see him?'

Glancing up at his 'prisoner,' he saw that the stranger, recovered from his shock, was shaking his head at him.

Still suspicious, but relenting because there was nothing else to be done, Sasuke muttered, "Never mind."

The youngster quickly trotted out, still keeping a hold of the trespasser's hand.

From that day on, Sasuke never mentioned this incident or any of the others that were to come.