Tsunade's Decision!! (volume)

is volume 18 of the Naruto manga.

Chapters

 * 154.
 * 155.
 * 156.
 * 157.
 * 158.
 * 159.
 * 160.
 * 161.
 * 162.

Synopsis
Orochimaru tracks down Tsunade and makes her an offer: heal his arms and in exchange he will revive her dead brother and lover. He gives her a week to consider it and leaves. Soon afterwards Jiraiya and Naruto find her and offer her the title of Hokage. She turns down the offer, instead choosing to insult the former Hokage. Naruto, enraged, attacks her with an incomplete Rasengan. Intrigued by his progress, Tsunade makes a bet with him: that he cannot perfect the Rasengan in a week. Naruto, determined to prove her wrong, accepts and dedicates his time to completing the attack. Once the week is up and he appears to have been unsuccessful, Tsunade, disappointed in his progress, goes to meet Orochimaru.