Naruto Shippuden
The Secret Origin of the Ultimate Tag Team!
S13 E7:
Tsunade and the Raikage arrive to prevent Naruto and Killer Bee from joining the battle. But the two Kage fail to convince the Jinchuriki to turn back, forcing the Raikage to use extreme force. Killer Bee tries to reason with his brother by reminding him of the time they first met and of the vow they made to each other.