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.
They're giving it their all
to secure those bonds.
Están dándolo todo para 
asegurar esos vínculos.
Están dándolo todo para proteger esos vínculos.
E stanno facendo qualsiasi cosa 
in loro potere per proteggerlo.
Eles estão dando tudo de si
 para cuidar desses laços.
Всеми силами пытаются сберечь их.