Grand Blue Dreaming Season 3 Episode 12: Episode 12

Manga chapter 23-24

HIGH

Oshimeter

9.6

5 Ratings

5★

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2★

1★

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Din't know we're getting Kohei and Aina's POV from previous episode xD. Sigh.. gonna miss this series... D:

Episode Context

This season finale retells the Okinawa outing from the other side of the surveillance. Aina recruits Kohei to follow Iori and Chisa, and the episode tracks their increasingly intrusive scheme through elaborate disguises, covert stakeouts, and a chain of escalating bad decisions. The tone swings between romantic-comedy paranoia and Grand Blue Dreaming's broad visual gags, with near-discoveries landing as punchlines rather than tension. Aina and Kohei carry the center of the episode while Iori and Chisa remain the unwitting focus of the operation. Pacing stays brisk, jumping between awkward close calls, and the diving atmosphere returns briefly to ground the farce. This is a companion piece to the previous installment rather than a standalone trip, paying off background details planted earlier and closing the season on playful romantic tension.

Runtime24 min

Filler StatusN/A

Plot ImportanceHIGH

Air DateSep 21, 2026

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