Waking Up.
The first two years of his life Sasuke was a pretty ordinary baby. A pretty cute infant with his plump cheeks and easy laugh. Pale skin, black obsidian eyes and black hair, Uchiha features that combined with the delicate features inherited from his mother made him simply adorable.
However, that was all that was remarkable about him. His appearance.
Sasuke was not a genius like Itachi. And that was fine, his brother was happy that he was not a prodigy because this meant he could enjoy a normal childhood.
For two years, Sasuke enjoyed being pampered by his parents; to hear his mother sing, to learn new words from his father, to play and laugh with his Itachi-nii.
Everything was fine until his brother took him to the park to play for a while. As always, he was being charged, despite knowing how to walk, because he liked to be spoiled and Itachi was unable to deny him anything.
It was not the first time he left home. His mother took him with her when she went to the market, to the doctor or they visited one of his many relatives and Itachi had taken him countless times for a walk.
He had seen the monument many times. He should have noticed before, but being honest the faces carved in the stone were crude interpretations and they really did not look anything like the people they represented.
On the other hand, he was a baby. He had problems paying attention to that kind of detail and his concentration went from one thing to another with great ease.
In short, it was not his fault.
Sasuke probably would have enjoyed a couple of years more in blessed ignorance if it was not because Itachi liked to share his wisdom through stories –His brother was an amazing narrator, his voice was pleasant to the ear and he could paint images with his words, Sasuke loved what that he called "story time"– and would have decided it was a good idea to talk about the Hokages.
Which, let me tell you, it was not.
As soon as he heard the name "Tobirama" a number of memories swirled in his mind, producing him a headache. They were images that did not make sense to him, but they opened a door that should have been closed.
At that time neither of the two brothers would know why Sasuke burst into tears and stirred with strength until the quiet and melodic voice of his brother cooed and fell asleep.
When he woke up, at midnight, in his room, inside his crib, surrounded by his toys and with a green stuffed dinosaur that Itachi's had given him as birthday present –And god, he loved that toy!– things had changed.
His mind had adjusted to all the knowledge that those memories had and his soul connected with a part of him that was asleep.
When Sasuke opened his eyes he realized that he was no longer Sasuke. That never had been.
He remembered that his name was Izuna Uchiha
He remembered his true family. And at the same time he understood that his parents were not his parents and that his brother was not his brother.
He remembered having died.
He remembered being killed by Tobirama.
Before that he could only think was: Well this sucks.