Chapter 20

Boat Diving (ボートダイビング) is chapter 20 of Grand Blue manga.

Summary
The members of Peek a Boo meet up at Miyakojima to go deep-sea diving. Iori, who never finished his exam due to sickness, is forced to stay in shallower waters while being teased about it by Kohei. As the licensed group goes diving, Chisa decides to stay on the boat to comfort Iori, who turns out to be suffering from seasickness. He then tells Chisa that despite missing the license, he had fun diving and would love to come back again. That night, after news that the group has been banned from their chosen restaurant, Shinji and Ryujiro announce that they will hold their own "Otori" in the hotel, where everyone will drink from a giant pot of mixed alcohol.

Characters in Order of Appearance

 * 1) Azusa Hamaoka
 * 2) Nanaka Kotegawa
 * 3) Aina Yoshiwara
 * 4) Chisa Kotegawa
 * 5) Iori Kitahara
 * 6) Kōhei Imamura
 * 7) Shinji Tokita
 * 8) Ryūjirō Kotobuki