Grand Blue Dreaming Season 3 is closing out its chaotic summer run with Episode 12, titled “Okinawa Landfall Again (Backstage).” The finale arrives on Monday, September 21, 2026, and it picks up right where the previous episode left off, with Iori and Chisa bumping into Aina and Kohei outside a love hotel in Okinawa. The official synopsis confirms the episode will reveal exactly what happened behind the scenes of Aina’s failed sabotage mission, and it also brings a major personal blow for Kohei that sends him into a complete daze.
When and Where to Watch Episode 12
Crunchyroll is streaming Grand Blue Dreaming Season 3 worldwide, with new episodes dropping on Mondays at 8:30 a.m. Pacific Time and 11:30 a.m. Eastern Time. The platform holds the license for North America, Central America, South America, Europe, Africa, Oceania, the Middle East, CIS, and the Indian Subcontinent.
Here are the exact streaming times for Episode 12 across major regions:
- USA (Pacific Time) and Canada (Vancouver): 8:30 a.m. PDT
- USA (Mountain Time): 9:30 a.m. MDT
- USA (Central Time): 10:30 a.m. CDT
- USA (Eastern Time), Canada (Toronto), and Peru: 11:30 a.m. EDT
- Brazil (São Paulo) and Argentina (Buenos Aires): 12:30 p.m. BRT
- United Kingdom, Portugal, and Ghana: 4:30 p.m. BST
- Central Europe, Spain, Italy, Poland, France, and Germany: 5:30 p.m. CEST
- South Africa (Johannesburg) and Greece: 6:30 p.m. SAST
- India (IST): 9:00 p.m.
- Indonesia (Jakarta) and Thailand (Bangkok): 10:30 p.m.
- Japan (JST) and South Korea (KST): 12:30 a.m. on September 22
- Australia (Sydney) and Australia (Melbourne): 1:30 a.m. AEST on September 22
- New Zealand (Auckland): 3:30 a.m. NZST on September 22
What Happened in Episode 11
Episode 11, titled “Okinawa Landfall Again (Front),” set the stage for the finale. Iori Kitahara used his lottery winnings to take Chisa Kotegawa on a second trip to Okinawa, fulfilling a promise he had made earlier in the season. Aina Yoshiwara, who has feelings for Iori, was desperate to stop the trip from happening. She begged Kohei Imamura for help, and while Kohei actually gave her solid advice to just confess her feelings, Aina was not ready to take that step.
Their initial sabotage plan failed, so Aina decided to drag Kohei along to Okinawa herself. Meanwhile, Iori and Chisa enjoyed sightseeing, snorkeling, and swimming practice, and the atmosphere between them grew noticeably warmer. The episode ended on a major cliffhanger. The hotel had accidentally booked them a room with a single double-sized bed, and the next morning, Iori and Chisa ran into Aina and Kohei walking out of a love hotel together.
How Episode 12 Affects the Story
The finale is structured as a “backstage” episode, meaning it fills in the gaps from Aina and Kohei’s side of the story. The official synopsis explains that Aina and Kohei secretly landed in Okinawa and followed Iori and Chisa in a light truck, attempting various sabotage tactics. Every single plan backfired because of Kohei’s bizarre behavior.
The biggest turning point for Kohei comes when he learns that his favorite voice actress has gotten married. This news completely breaks him, reducing him to what the synopsis describes as a “complete corpse”. With Kohei in no condition to function, he and Aina are forced to stay at a love hotel, which is exactly how Iori and Chisa find them the next morning.
This episode matters because it resolves the misunderstanding that has been building between the two pairs. Aina’s unrequited feelings for Iori are now fully exposed to Chisa, and Kohei’s emotional collapse adds a layer of vulnerability to a character who is usually just comic relief. The finale also serves as the closing chapter of the Palau and Okinawa arc, tying together the season’s themes of friendship, awkward romance, and the group’s chaotic dynamic.
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Little-Known Facts About Grand Blue Dreaming
The manga has surpassed 10 million copies in circulation, and it has been running in Kodansha’s good! Afternoon magazine since 2014. The series was created by Kenji Inoue, who also wrote Baka and Test, and illustrated by Kimitake Yoshioka, who previously worked on Lagrange: The Flower of Rin-ne.
A live-action film adaptation opened in Japanese theaters in August 2020, and the franchise has also received a stage play adaptation. The anime’s first season aired in 2018 and was produced by Zero-G, with Shinji Takamatsu returning as director, scriptwriter, and sound director for Season 3.
Season 3 introduced Saber Works as a co-animation studio alongside Zero-G. The opening theme “Natsuko” is performed by FUNKY MONKEY BΛBY’S, while the ending theme “Hadaka no Mermaid (Naked Mermaid)” is by MAMESHiBA NO TAiGUN.
Despite the title, the anime is famous for having very little actual diving. The story focuses far more on college partying, absurd drinking games, and the chaotic bromance between the male characters. The series is officially described in Japan as a “full-naked youth diving” story, a label that captures both its scuba setting and its tendency toward outrageous, clothes-free comedy.
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