Grand Blue Episode 12 -

"Ototoi" (The Day Before Yesterday) serves as the 12th episode and finale of the first season of Grand Blue Dreaming , concluding the "Okinawa Trip" arc with a blend of intense, scenic diving sequences and the series' signature, chaotic comedy. The episode, produced by Zero-G and available on Amazon Prime Video and Crunchyroll, highlights Iori's character growth and reinforces the "found family" theme among the club members, setting the stage for future seasons, with Season 2 released in 2025 and a third season announced for 2026.

Grand Blue Dreaming (TV Series 2018–2025) - Episode list - IMDb Grand Blue Episode 12