The essential episodes of Grand Blue

Watch these 15 in order and you've got Grand Blue — each pick states its reason.

1. 01

   S01E01 · Pilot · July 14, 2018 · 24m

   Deep Blue8.7

   When Iori Kitahara heads off to college, he decides to live at his uncle's dive shop in Izu. Iori is looking forward to experiencing college life, but ends up running into a group of tough guys playing strip rock-paper-scissors. Iori gets dragged into the diving club's crazy shenanigans and ends up spending his first day in college wearing nothing but a pair of underwear.

2. 02

   S01E02 · Top rated · July 21, 2018 · 24m

   Underwater8.6

   After a cutthroat battle with Kohei Imamura, a handsome otaku from school, Iori ends up joining the Peek-a-Boo diving club. Iori arrives home worn out from the day, but perks up when he hears about a party with a women's college. However, his cousin Nanaka won't allow him to stay out three nights in a row, so Iori tries to show her he's an independent man to get her to let him go.

3. 03

   S01E03 · Top rated · July 28, 2018 · 24m

   A New World8.4

   Iori and Kohei don wetsuits and head to the sea! Although Iori used to be afraid of the water, he starts becoming more interested. But diving equipment is expensive! Tokita and Kotobuki decide to hold a men's beauty pageant for the Izu Spring Festival in May. The guys want to avoid being paraded around on stage, so they try to get Chisa to participate in a women's beauty pageant.

4. 04

   S01E04 · Top rated · August 4, 2018 · 24m

   The Male Beauty Pageant8.7

   The Izu Spring Festival has begun! The members of Peek-a-Boo run an okonomiyaki stall with Iori, Kohei, Chisa, and Azusa helping out. Iori finds himself in a complicated situation when a misunderstanding with Azusa occurs and a rivalry with the tennis club Tinkerbell begins. When Chisa gets nervous and freezes up during the women's beauty pageant, Iori and Kohei think of a plan to cheer her on.

5. 05

   S02E02 · Top rated · July 15, 2025 · 24m

   Brother8.0

   Shiori's here and on a mission! How will Iori handle this situation?

6. 06

   S02E04 · Top rated · July 29, 2025 · 24m

   Ticket Scramble8.3

   Aina has a spare ticket for the Oumi Women's University Festival, and it causes all sorts of chaos.

7. 07

   S02E05 · Top rated · August 5, 2025 · 24m

   First Time at a Women's University8.3

   Iori and Kohei attend the All-Girls College Festiva, but the girls ask them to help out at the cafe.

8. 08

   S02E06 · Season 2 peak · August 12, 2025 · 24m

   Back to the All-Girls College8.7

   After being expelled from college, the boys devise various plans to get back into it.

9. 09

   S02E07 · Top rated · August 19, 2025 · 24m

   The Charpy Impact Test8.3

   Iori and his class need to cooperate and do a very dangerous experiment together.

10. 10

    S02E08 · Top rated · August 26, 2025 · 24m

    Coworkers8.7

    Iori runs into a familiar face at his new part-time job, and this is going to complicate matters!

11. 11

    S02E09 · Top rated · September 2, 2025 · 24m

    Are You In Love?8.3

    All sorts of misunderstandings ensue as attraction comes into the equation.

12. 12

    S02E10 · Top rated · September 9, 2025 · 24m

    Movie Date8.3

    Iori is asked out on a movie date, and he hears some news that complicates things.

13. 13

    S02E11 · Top rated · September 16, 2025 · 24m

    Let's Go to an Uninhabited Island!8.7

    The gang heads out to a camping site on an uninhabited island, only to run into some unexpected faces.

14. 14

    S02E12 · Top rated · September 23, 2025 · 24m

    Now We're Even8.5

    Iori learns that a lot will soon change for the club.

15. 15

    S03E01 · Season 3 peak · July 7, 2026 · 24m

    Unfinished Business8.0

    Summer is coming to an end, and the older kids at the club want to do the things they still have left to do.