Team Kakashi are stunned to learn that Sai's true mission is to kill Sasuke.  Naruto wants to believe that the smile Sai showed them was real, but there is a possibility that it was all an act.
then why didn't you kill me
back then?!
¡¿entonces por qué no 
me mataste aquella vez?!
¡¿por qué no me mataste aquella vez?!
allora perché non mi hai ucciso quella volta?!
por que você não me 
matou naquela vez?!
почему ты тогда не убил меня?