Tale of Naruto Uzumaki

is episode 174 of the Naruto: Shippūden anime.

Synopsis
Nagato completes his story and asks Naruto for his answer. Naruto answers that he is right, and he can't forgive Nagato and wishes to murder him so badly. But then declares that since his master believed in a world where all people can get along, that he did to, and would not kill Pain. Nagato insults Naruto and tells him it is not possible. Naruto shows him The Tale of the Utterly Gutsy Shinobi (novel) book and shows him that it was dedicated to Nagato, which puts him in a lot of thought. To break the cycle of hatred, Naruto told Nagato and Konan that, despite hating them, he would not kill them. He sais it is his nindō to never go back on his word and resolves to break the cycle of hatred, despite not knowing how yet. Nagato remembers the story of the ninja against all odds, manages to defeat his opponent in the forest, and pictures himself as the shinobi. He recalls the man saying just what Naruto had resolved to do and being asked his name. Just right before he can say so in his head, Naruto yells out "Naruto!". Amazed by Naruto's determination to his answer, Nagato says that he would believe in him, and performs the Outer Path: Samsara of Heavenly Life Technique to try paying the debt for his sins.