Volume 21 of Grand Blue (ぐらんぶる) a manga series written by Kenji Inoue and illustrated by Kimitake Yoshioka. It is serialized in Good! Afternoon magazine since April 2014.
This manga series follows Iori Kitahara, a boy who moves to Izu peninsula in order to start his life in college. He will stay in a room located above his uncle's diving shop Grand Blue. His life will change as soon as he meets the local diving club, a group of people who spend more time drinking and having fun than diving.
This manga does not contain furigana.