The Two Students

is episode 169 of the Naruto: Shippuden anime.

Synopsis
As Hinata is being healed by Sakura, Naruto defeats the Deva Path with a Rasengan. Naruto pulls out the chakra receivers out of the Deva Path and then he heads over to the real Pain. Team Guy feels as though they should go with Naruto but he doesn't want any back up. As Naruto approaches Nagato and Konan, Nagato sends a rod into Naruto only for Naruto to use the fox's chakra to disturb Pain's chakra. Naruto then asks why Nagato and Konan are a part of the Akatsuki, and he ends with telling Naruto that they have to go back into his past.

Trivia

 * In the omake of this episode, Ino and Sakura beg Tsunade to see how she looked in her childhood upon finding out that she used to change to whatever form of her previous ages she wanted during her travels with Shizune and Tonton. She transforms into her childhood apearance, only to have Sakura and Ino stare at her chest and gets frightened. The two jealous kunoichi then furiously harass their mentor with question of what her lifestyle was like before she got her breasts to see how she got her rather enormous chest, like what she ate. Tsunade furiously transforms back and smashes the ground with her Painful Sky Leg.