Tsunade's Decision!! (volume)

is volume 18 of the Naruto manga.

Chapters

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

Synopsis
Orochimaru tracked down Tsunade and made her an offer: if she healed his arms, in exchange he would revive her dead brother and lover. He gave her a week to consider it, and left. Soon afterwards, Jiraiya and Naruto found her, and offered her the title of Hokage. She turned down the offer, however, instead choosing to insult the former Hokage. Naruto, enraged, attacked her with an incomplete Rasengan. Intrigued by his progress, Tsunade made a bet with him: that he wouldn't be able to perfect the Rasengan in a week. Naruto, determined to prove her wrong, accepted, and dedicated his time to completing the attack. Once the week was up and he appeared to have been unsuccessful, Tsunade, disappointed in his progress, went to meet Orochimaru.