Chapter 4

Underwater (水の中で) is chapter 4 of Grand Blue manga.

Summary
Shinji and Ryujiro try to get Iori used to being underwater at a local pool to prepare him for deep-sea diving. However, after seeing Ryujiro rip off Kohei's bottom, Iori resolves not to get involved. That night, Nanaka takes Iori to an aquarium at Chisa's request, inspiring him to try out diving.

Characters in Order of Appearance

 * 1) Iori Kitahara
 * 2) Shinji Tokita
 * 3) Ryūjirō Kotobuki
 * 4) Nanaka Kotegawa
 * 5) Chisa Kotegawa
 * 6) Toshio Kotegawa
 * 7) Kōhei Imamura