Ryugu High School Diving Club

Lore & Background

Their reputation precedes them throughout the Izu Peninsula. Local dive shops and other clubs know them as a group that can be serious underwater but chaotic on land. The 'Ryugu' nickname occasionally surfaces in fan discussions referencing the deep-sea theme of their basement hideout, symbolizing how they live beneath the surface of normal student life. Despite the partying, members like Kitazawa and Chika maintain high standards for safety and skill.

Reader's Guide

The hierarchy is loose, led by the President (Kato) who manages logistics while Kitazawa often handles technical diving instruction. Recruitment is informal; new members are usually dragged into the fold through parties or mutual friends rather than formal applications. Traditions include pre-dive parties that can last for days and post-dive celebrations involving significant amounts of alcohol. The club plays a central role in the series' social dynamics, acting as a bridge between university life and local diving culture. High school interactions are common during festivals, where the university members act as mentors or rivals. This dynamic drives much of the plot's humor and character growth, especially for Ichiro who navigates both worlds.

Did You Know?

• The basement house is a real location inspiration found in Izu, Japan.
• Members frequently use diving gear for comedic purposes unrelated to actual diving.