Grand Blue Dreaming Season 3

What is Grand Blue Dreaming Season 3 about?

Grand Blue Dreaming Season 3 is a TV anime series of 12 episodes animated by Zero-G, adapted from a manga. It aired from July 7, 2026 to September 22, 2026. AniList classifies it as comedy, slice of life and sports. It continues from Grand Blue Dreaming Season 2, which is worth watching first.

Synopsis from AniList, which credits Crunchyroll. The summary above it is written by FreeAnime.xyz from AniList's data.

Themes AniList users associate with it: Outdoor Activities, Nudity, Family Life, Coastal, Surreal Comedy, Slapstick, Male Protagonist, School Club, Primarily Adult Cast, College.

Main characters

Characters AniList lists in a main role, with spoiler-free notes.

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  Chisa Kotegawa 古手川千紗

  Main character

  Chisa Kotegawa is Iori's cousin and a first-year mechanical engineering student at Izu University. Chisa appears to more level-headed and serious compared to other characters. She has a clear dislike for rowdy behavior and can be quite hostile, especially when it is directed towards her (especially with Iori).

  Japanese voice: Chika Anzai

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  Iori Kitahara 北原伊織

  Main character

  Iori Kitahara is a first year Mechanical Engineering student at Izu University. Despite no initial interest, Iori comes to love diving and spending time with the members of the club, whom he becomes friends with and cares about despite their rambunctious behavior and endless crazy schemes.

  Japanese voice: Yuuma Uchida

• 

  Kouhei Imamura 今村耕平

  Main character

  A first-year Mechanical Engineering student at Izu University. He is Iori's best friend and a diehard otaku, perceived to be a lolicon by his acquaintances. He happens to be particularly obsessed with the little sister character trope (hence his obsession with Shiori Kitahara).

  Japanese voice: Ryouhei Kimura

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  Aina Yoshiwara 吉原愛菜

  Main character

  Aina is a first year at Oumi Women's University. She joins Grand Blue Diving Club after getting to know Iori and Kouhei. She is a really shy girl and hates having to expose her skin. She soon becomes good friends with Chisa.

  Japanese voice: Kana Asumi

Supporting characters

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  Azusa Hamaoka 浜岡梓

  Supporting character

  Azusa Hamaoka is a third-year at Oumi University and is a part of the intercollegiate diving club with Izu University. Known for her very outgoing and exhibitionist personality, she displays particular friendship/comradeship to Iori.

  Japanese voice: Toa Yukinari

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  Shinji Tokita 時田信治

  Supporting character

  He is a third year Mechanical Engineering student at Izu University.

  Japanese voice: Hiroki Yasumoto

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  Ryuujirou Kotobuki 寿竜次郎

  Supporting character

  He is a third year Mechanical Engineering student at Izu University.

  Japanese voice: Katsuyuki Konishi

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  Nanaka Kotegawa 古手川奈々華

  Supporting character

  Iori's Elder Cousin. When Iori comes to Grand Blue he doesn't recognise her at first since she had become very beautiful and gets attracted to her only to find out later that she has become a siscon who smells her younger sister Chisa's after worn clothes and takes her photo all the time.

  Japanese voice: Maaya Uchida

• 

  Yuu Mitarai 御手洗優

  Supporting character

  One of Iori's classmates at Izu University. Unlike most of the others, Yuu is in a relationship with his childhood friend Rie, which his friends immediately attempt to sabotage once they find out.

  Japanese voice: Natsuki Hanae

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  Shinichirou Yamamoto 山本真一郎

  Supporting character

  He is a first year Mechanical Engineering student at Izu University. He is a chubby young man with short hair parted in the middle. He mostly seen wearing a plain t-shirt under a sweatshirt and sweatpants. He is really bent on the idea that he needs a girlfriend and he is a complete virgin

  Japanese voice: Junya Enoki

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  Toshio Kotegawa 古手川登志夫

  Supporting character

  The owner of the diving shop Grand Blue and Iori's uncle. Toshio seems to have a jovial personality and is quite laid back, as he doesn't seem to mind all the havoc that the club members wreck when drinking and partying.

  Japanese voice: Shinji Kawada

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  Hajime Nojima 野島元

  Supporting character

  He is a first year Mechanical Engineering student at Izu University. Nojima is a tall and self-proclaimed handsome young man.

  Japanese voice: Takuya Eguchi

• 

  Kudou 工藤会長

  Supporting character

  The Captain of the Tennis Club "Tinkerbell" and a beautiful young man who is attracted to Azusa. Kudou is an arrogant womanizer that would do almost anything to achieve his goal. He tends to mistreat those whom he considers lowly.

  Japanese voice: Jun Fukuyama

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  Kaya Mizuki 水樹カヤ

  Supporting character

  Famous voice actor and idol who is worshipped by Kouhei. Her real name is Maya.

  Japanese voice: Nana Mizuki

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  Kenta Fujiwara 藤原健太

  Supporting character

  One of Iori's classmates at Izu University. A muscular man who is jealous of Iori supposedly getting Chisa's affection.

  Japanese voice: Robert Waterman

• 

  Sakurako Busujima 毒島桜子

  Supporting character

  She is a student at Oumi Women's University and the coworker of Iori Kitahara and Naomi Otoya. She has a crush on Otoya Naomi.

  Japanese voice: Aya Yamane