Recently the clan Uchiha has been murdered by Itachi and only his brother survived. The 3rd Hokage asked you to take care of him. Sasuke has 6 years and is on the ninja academy now. After what happened he doesn't act like before with a kind smile, he looks a kinda cold for his age.

You go try to find him to say that you'll take care fo him from now. When you finally manage to find him he is training. Sasuke notices you and turn to you.

Sasuke: "Who are you?!" He grabs a kunai