# Grand Blue Dreaming

Grand Blue Dreaming, known in Japan simply as Grand Blue (Japanese: ぐらんぶる, Hepburn: Guran Buru), is a Japanese manga series written by Kenji Inoue [ja] and illustrated by Kimitake Yoshioka [ja]. It has been serialized in Kodansha's seinen manga magazine Good! Afternoon since April 2014. The manga is published digitally in English by Kodansha USA under the Kodansha Comics imprint. An anime television series adaptation by Zero-G aired from July to September 2018 in the Animeism programming block on MBS. A live-action film adaptation was released in August 2020. A second anime season by Zero-G and Liber is set to premiere in July 2025.

## Plot

Iori Kitahara looks forward to his new life on the Izu Peninsula as he prepares to start his college life there, staying in a room above his uncle's diving shop "Grand Blue." However, he is quickly shocked as he meets the local Diving Club, a group full of buff men who spend more time drinking, partying, and stripping naked than actually diving. Despite his attempts to distance himself from the group, Iori gets quickly swept up in their antics, while his cousins try to show him the wonders of diving into the ocean and sea.

## Characters
### Peek a Boo (Diving Club)
#### Iori Kitahara (北原 伊織, Kitahara Iori)

    Voiced by: Yuma Uchida
    Portrayed by: Ryo Ryusei (live-action film)
    Iori is a first year Mechanical Engineering student at Izu University who had never learned to swim, despite being part of the diving club. Though he initially tries to live a normal life, Iori quickly got pulled into the "Peek a Boo" Diving Club's activities often ended with drunk, naked revelry. He often acts aloof and boisterous but he treasures his relationships to the point he will repress his worse traits when necessary. Although his father was adopted by the Kotegawas, he sees Chisa and Nanaka as family. Iori's open, earnest nature wins over several characters he encounters throughout the story although his initially childish tendencies led him into conflict with said individuals. In the past he enjoyed writing songs and dreamed of creating a band, memories he finds embarrassing due to his previous dearth of skill and saccharine sentiment. Iori is skilled at playing tennis, volleyball, and almost any other sport involving precise aim. He has a neurotic habit of overthinking straightforward problems with over-the-top, wild speculations.

#### Chisa Kotegawa (古手川 千紗, Kotegawa Chisa)

    Voiced by: Chika Anzai
    Portrayed by: Yūki Yoda (live-action film)
    Iori's cousin and classmate at Izu University, Chisa is a smart and attractive girl with a passion for diving. Compared to the other members in the Peek a Boo club, Chisa is portrayed as the most "normal". She is level-headed, reserved, and rarely partakes in drunken shenanigans. She is uninterested in romance. To her chagrin, she was forced to fend off regular attempts by other university students to hit on her. Chisa's main ambition is to become a dive instructor like her mother so she immerses herself in diving culture over anything else. She was not above using others to preserve her solitude, including feigning a relationship with Iori to drive off suitors and punish him for going out of his way to help Aina instead of her during the beauty contest. Her relationship with Iori vacillates between tenderness over a shared love of diving and cold disgust at his boisterous nature. As a result of a chilly relationship with her mother, Chisa does not openly express her feelings. In emotional scenarios, she tended to get flustered and lose her composure.

#### Kōhei Imamura (今村 耕平, Imamura Kōhei)

    Voiced by: Ryōhei Kimura
    Portrayed by: Atsuhiro Inukai (live-action film)
    Iori's best friend, with whom he has a friendly rivalry. Kōhei is a hardcore otaku who often wears shirts with his favorite anime girl character on them. He came to the university to chase his impossible dream of running a harem of cute high-school girls and ends up getting roped into Peek a Boo. Many of Kōhei's comedic antics are drawn from his obsession with anime culture and subsequent detachment from reality. He is often clueless in reading social situations or conflates their dynamics with parallels from his favorite shows. One running gag is how easily he is manipulated by other Peek a Boo members through his love of famous female voice actors; in particular, his admiration of Kaya Mizuki becomes a relevant plot point in multiple arcs. In rarer circumstances he showcases remarkable resilience, strength, and astuteness when his anime-related interests are threatened. At first glance, Kōhei's relationship with Iori is defined by slapstick violence and rancor over petty, trivial disagreements, but he cares for his friend's well-being and is dependable when it really counts. It's subtly implied he comes from a wealthy background.

#### Aina Yoshiwara (吉原 愛菜, Yoshiwara Aina)

    Voiced by: Kana Asumi
    Portrayed by: Ren Ishikawa (live-action film)
    A freshman from Oumi Women's College and a former member of the Tennis Club "Tinkerbell." Nicknamed "Cakey" due to the large amount of makeup she used to put on her face in an attempt to be more popular with guys, Aina later joins Peek a Boo after Iori and Kōhei stand up for her. Although she initially asks out Kōhei, she develops persistent romantic feelings for Iori after he humiliates Captain Kudō to avenge her bullying at the hands of Tinkerbell. Without her makeup on Aina is much more mild-mannered and bashful, and often played the tsukkomi role to the crazy antics around her. She was the only one in the group who could not cook well, and was the clumsiest of them all. She grew up on a farm and as a result, is quite skilled at manual labor including driving stick shift. Her country background made her self-conscious about her rural accent, which she occasionally slips into whenever nervous, and enamored of activities she associates with glamorous city life. Aina's isolated childhood fosters a naive romantic outlook which derives her ideas of love from movies and books. Out of all Peek a Boo members she was the most bashful about her body type. She negatively compares herself to Nanaka and Azusa, only able to act extroverted when she had makeup on. Contrary to appearance, she turns into a terrifying party animal after imbibing a small amount of alcohol.

#### Ryūjirō Kotobuki (寿 竜次郎, Kotobuki Ryūjirō)

    Voiced by: Katsuyuki Konishi
    Portrayed by: Hiroaki Iwanaga (live-action film)
    A senior student at Izu and member of Peek a Boo who often got himself and other club members drunk and naked. Kotobuki is just like Tokita both in appearance and in personality when they are partying, but Kotobuki can be surprisingly charismatic. He works as a professional bartender part-time.

#### Shinji Tokita (時田 信治, Tokita Shinji)

    Voiced by: Hiroki Yasumoto
    Portrayed by: Suzunosuke Tanaka (live-action film)
    A senior student at Izu and member of Peek a Boo who often got himself and other club members drunk and naked, Tokita is a muscular, laid-back college student who loved to party. However, just like the other members of PAB, he sincerely loves diving and takes the possible dangers seriously. To Iori's surprise, he has a girlfriend.

#### Azusa Hamaoka (浜岡 梓, Hamaoka Azusa)

    Voiced by: Toa Yukinari
    Portrayed by: Yuka Ogura (live-action film)
    A senior student from Oumi Women's College and member of Peek a Boo who often parties with the other senior members, despite being one of the few women in the club. She is portrayed with an unwittingly sensual and seductive demeanor leading her younger contemporaries to assume she's sexually experienced. However her promiscuity is largely limited to an erotic obsession with Nanaka, which is played up for laughs. She has an unrequited crush on Tokita but believes pursuing it would damage the dynamics of the senior Peek a Boo group. Azusa is extremely lax about her appearance and often catches people off-guard by stripping without a second thought. She initially grows close to Iori after mistakenly concluding he's bisexual, seeking him as a possible confidant with whom she can discuss her own fetishes. Azusa has a generous spirit and acute perception that compels her to help other Peek a Boo members with their personal troubles. This is mixed with a mischievous streak that ends up complicating matters in humorous ways.

### Grand Blue (Diving Shop)
#### Nanaka Kotegawa (古手川 奈々華, Kotegawa Nanaka)

    Voiced by: Maaya Uchida
    Portrayed by: Aya Asahina (live-action film)
    A voluptuous woman and diving instructor at Grand Blue who mostly observes the diving club's antics. She is the least involved with PAB's drinking parties, and the members have admitted they are more reserved in stripping and drinking when she is there. She is secretly infatuated with Chisa, despite being her sister, but she has admitted she would support Iori if he promised to make Chisa happy. Ironically, Nanaka is uncomfortable or clueless about most things sexual, leading her to stumble into perverted situations with Iori and Azusa. She possesses frightening strength that manifests whenever she sees a possible threat to her relationship with Chisa.

#### Toshio Kotegawa (古手川 登志夫, Kotegawa Toshio)

    Voiced by: Shinji Kawada
    Portrayed by: Masahiro Takashima (live-action film)
    The owner of the diving shop Grand Blue and Iori's uncle, as well as father of Chisa and Nanaka.

#### Kaya Mizuki (水木 カヤ, Mizuki Kaya)

    Voiced by: Nana Mizuki
    A famous voice actor and idol who is acquainted with Peek a Boo on account of her diving hobby. She is friends with Azusa and thinks highly of Iori. She is Kōhei's favorite voice actress.

### Other characters
#### Captain Kudō (工藤会長, Kudō-kaichō)

    Voiced by: Jun Fukuyama
    Portrayed by: Yuya Hirata (live-action film)
    The Captain of the Tennis Club "Tinkerbell" and an attractive playboy who was publicly humiliated by Iori and Kōhei due to his mistreatment of Aina.

#### Hajime Nojima (野島 元, Nojima Hajime)

    Voiced by: Takuya Eguchi
    Portrayed by: Yūki Morinaga (live-action film)
    One of Iori's classmates at Izu University. A self-styled playboy who is largely unsuccessful in attracting a lover. Although he tries to be charismatic, it usually comes off as lame.

#### Shinichirō Yamamoto (山本 信一郎, Yamamoto Shin'ichirō)

    Voiced by: Junya Enoki
    Portrayed by: Yūma Yamoto (live-action film)
    One of Iori's classmates at Izu University. Incredibly blunt in his desire to find a girlfriend, he is often teased by his friends he will be a lifelong virgin.

#### Kenta Fujiwara (藤原 健太, Fujiwara Kenta)

    Voiced by: Robert Waterman
    One of Iori's classmates at Izu University. A muscular man, and the most decent and innocent of Iori's friends. He is often portrayed as invisible to other significant characters as a on-running joke.

#### Yū Mitarai (御手洗 優, Mitarai Yū)

    Voiced by: Natsuki Hanae
    One of Iori's classmates at Izu University. Unlike most of the others Yu is in a relationship with his childhood friend Rie, which his friends immediately attempt to sabotage once they find out. Through a self-destructive desire to flirt or his friends' machinations, he finds himself beaten up by Rie on multiple occasions.

#### Shiori Kitahara (北原 栞, Kitahara Shiori)

    Voiced by: Sumire Morohoshi
    Iori's little sister, a third-year middle school student who often walks around in an old-fashioned kimono. She pretends to show affection to Iori while secretly trying to mold him into taking ownership of their family's ryokan so she will not have to, as she seeks to escape the stringent demands placed upon her by her parents. Shiori is unusually cunning and intelligent for her age, able to construct surveillance equipment as well as maintain a facade as a impeccably mannered young girl who dotes on her brother. She later develops genuine respect for Iori although she still dismisses him as dim-witted and irresponsible.

#### Naomi Otoya (乙矢 尚海, Otoya Naomi)

    Voiced by: Yoshino Aoyama
    Iori's co-worker, and a high-school student. He is passionate about diving and is the president of the diving club at his school.

#### Sakurako Busujima (毒島 桜子, Busujima Sakurako)

    Voiced by: Aya Yamane
    A student at Oumi Women's University. She is focused on good looks, both for herself and her partners.

## Media
### Manga

Written by Kenji Inoue [ja] and illustrated by Kimitake Yoshioka [ja], Grand Blue started in Kodansha's seinen manga magazine Good! Afternoon on April 7, 2014. Kodansha has compiled its chapters into individual tankōbon volumes. The first volume was released on November 7, 2014. As of October 2024, twenty-three volumes have been released.
Kodansha USA is publishing the series digitally, with eighteen volumes published as of June 6, 2023.

#### Volumes

| No. | Original release date | Original ISBN | English release date | English ISBN |
| 1 | November 7, 2014 | 978-4-06-387990-2 | July 10, 2018 | 978-1-63-236666-5 |
| 1. "Deep Blue" (ディープブルー, Dīpu Burū) 2. "Welcoming Party" (新歓コンパ, Shinkan Konpa) 3. "My Own Room" (マイルーム, Mairūmu) 4. "Underwear" (水の中で, Mizu no Naka de) |||||
| 2 | December 5, 2014 | 978-4-06-388018-2 | September 11, 2018 | 978-1-63-236667-2 |
| 5. "A New World" (新世界, Shin Sekai) 6. "Order Women" (年上の女, Toshiue no Onna) 7. "Miss Izu" (ミスコン, Misukon) 8. "Mister Izu" (男コン, Dan kon) Side Story: "Idiots, Tests and Cheating" (バカとテストとカンニング, Baka to Tesuto to Kanningu) |||||
| 3 | April 7, 2015 | 978-4-06-388053-3 | November 27, 2018 | 978-1-63-236668-9 |
| 9. "The After-Festival" (後の祭り, Ato no Matsuri) 10. "The Mixer" (合コン, Gōkon) 11. "First Buddy" (初バディ, Hatsu Badi) 12. "Doubles" (ダブルス, Daburusu) Side Story: "A Normal Drinking Party" (普通の飲み会, Futsū no Nomikai) |||||
| 4 | September 7, 2015 | 978-4-06-388081-6 | February 19, 2019 | 978-1-63-236740-2 |
| 13. "Drinking at Home" (部屋飲み, Heya Nomi) 14. "A Man's Cocktail" (男のカクテル, Otoko no Kakuteru) 15. "Shopping!" (ショッピング！, Shoppingu!) 16. "Okinawa Landing" (沖縄上陸, Okinawa jōriku) 17. "A Place Without Lies" (ウソのない場所, Uso no Nai Basho) |||||
| 5 | February 5, 2016 | 978-4-06-388115-8 | April 2, 2019 | 978-1-63-236724-2 |
| 18. "It's All A Misunderstanding" (誤解なんだが, Gokaina Ndaga) 19. "Trial (試練", Shiren) 20. "Boat Diving" (ボートダイビング, Bōto Daibingu) 21. "Otori" (オートリ, Otōri) Side Story: "Unity" (団結, Danketsu) |||||
| 6 | August 5, 2016 | 978-4-06-388164-6 | May 21, 2019 | 978-1-63-236725-9 |
| 22. "Girl's Night" (女子会, Joshi kai) 23. "The Ticket Contest" (チケット争奪戦, Chiketto Sōdatsu-sen) 24. "First Trip to a Woman's University!" (はじめての女子大, Hajimete no Joshidai) 25. "Woman's University, Revisted" (再びの女子大, Futatabi no Joshidai) Side Story: "Letter" (手紙, Tegami) |||||
| 7 | December 7, 2016 | 978-4-06-388220-9 | July 2, 2019 | 978-1-63-236792-1 |
| 26. "House Sitting" (留守番, Rusuban) 27. "Little Sister" (妹, Imōto) 28. "Big Brother" (兄, Ani) Side Story: "Mahjong" (麻雀, Mājan) |||||
| 8 | April 7, 2017 | 978-4-06-388249-0 | October 29, 2019 | 978-1-63-236837-9 |
| 29. "The Impression Game" (印象ゲーム, Inshō Gēmu) 30. "I'm Not Stripping Okay?" (脱がないよ？, Nuganai yo?) 31. "Associate Professor" (准教授, Jun Kyōju) 32. "Charpy Impact Test" (シャルピー衝撃試験, Sharupī Shōgeki Shiken) 33. "School Camping for Adults" (大人の林間学校, Otona no Rinkan Gakkō) |||||
| 9 | October 6, 2017 | 978-4-06-388290-2 | January 7, 2020 | 978-1-63-236812-6 |
| 34. "Coworkers" (バイト仲間, Baito Nakama) 35. "Otoya-kun Sees All" (乙矢(おとや)君にはよく見えている。, Otoya-kun Ni Wa Yoku Miete Iru) 36. "Do You Like Him?" (好きなの?, Suki na no?) 37. "Serious" (本気, Honki) |||||
| 10 | March 7, 2018 | 978-4-06-511096-6 | April 28, 2020 | 978-1-63-236910-9 |
| 38. "Movie Date" (映画デート, Eiga Dēto) 39. "Auction House" (オークションハウス, Ōkushon Hausu) 40. "White Lab" (ホワイト研, Howaito-ken) 41. "Let's Go to the Uninhabited Island!" (無人島へ行こう！, Mujintō e yukō!) Side Story: "Group Discussion" (グループディスカッション, Gurūpu disukasshon) |||||
| 11 | July 6, 2018 | 978-4-06-511979-2 | October 13, 2020 | 978-1-63-236949-9 |
| 42. "Let's Have Fun on an Uninhabited Island!" (無人島で遊ぼう！, Mujintō de Asobō!) 43. "Let's Survive on an Uninhabited Island!" (無人島を生き抜こう！, Mujintō o Ikinukō) 44. "Life Counseling" (人生相談, Jinsei Sōdan) 45. "Now We're Even" (これでチャラ, Kore de Chara) Side Story: "Café Pilgrimage" (カフェ巡り, Kafe Meguri) |||||
| 12 | November 22, 2018 | 978-4-06-513447-4 | March 9, 2021 | 978-1-64-651043-6 |
| 46. "Unfinished Business" (やり残し, Yari nokoshi) 47. "Homecoming" (帰省, Kisei) 48. "Saving Private Passport" (パスポート奪還作戦, Pasupōto Dakkan Sakusen) 49. "Hentai" 49.5. "To Palau" (パラオへ, Parao e) |||||
| 13 | June 22, 2019 | 978-4-06-516238-5 | June 22, 2021 | 978-1-64-651044-3 |
| 50. "Reunion" (再会, Saikai) 51. "The Seas of Palau" (パラオの海, Parao no Umi) 52. "TV special" (TV取材, TV Shuzai) 53. "Filming" (収録現場, Shūroku Genba) Side Story: "Lie Detector" (ウソ発見器, Uso Hakken-ki) |||||
| 14 | November 22, 2019 | 978-4-06-517557-6 | October 26, 2021 | 978-1-64-651142-6 |
| 54. "Wingman" (アシスト, Ashisuto) 55. "Girl Talk" (女子トーク, Joshi Tōku) 56. "Fun Dive" (ファンダイビング, Fan Daibingu) 57. "Mom" (お母さん, Okā-san) Side Story: "Truth or Dare Jenga" (黒のジェンガ, Kuro no Jenga) |||||
| 15 | May 22, 2020 | 978-4-06-519480-5 | March 8, 2022 (print) April 19, 2022 (digital) | 978-1-64-651207-2 |
| 58. "Back to School" 59. "Mixer: Round Two" 60. "Chestnut Picking" 61. "Lottery" Side Story: "The Art of Escape" |||||
| 16 | November 20, 2020 | 978-4-06-521417-6 | July 19, 2022 (print) June 14, 2022 (digital) | 978-1-64-651402-1 |
| 62. "War Council" 63. "Okinawa Relanding" 64. "Okinawa Relanding : Behind the Scenes" 65. "Day Two of Chaos" Side Story: "Puppy" |||||
| 17 | August 5, 2021 | 978-4-06-524292-6 | October 4, 2022 | 978-1-64-651403-8 |
| 66. "Sakurako's Journey" 67. "SHIT!" 68. "Mi Amor" 69. "Two To Return" |||||
| 18 | March 7, 2022 | 978-4-06-527041-7 | February 21, 2023 | 978-1-64-651699-5 |
| 70. "Death Game" 71. "Bedtime Calisthenics" 72. "Sorrow - Round Two" 73. "Rebound Challenge" Side Story: "Cafeteria 1" |||||
| 19 | August 5, 2022 | 978-4-06-528768-2 | June 6, 2023 | 978-1-64-651700-8 |
| 74. "Hypnosis Crisis" 75. "Dress-Up" 76. "Wedding Reception" 77. "Catfight" Side Story: "The Passion of Ichiro Yamamoto" |||||
| 20 | April 6, 2023 | 978-4-06-531329-9 | November 19, 2024 | 979-8-88-877046-7 |
| 78. "Amusement Park" 79. "White Counseling Room" 80. "Advance!" 81. "Shark Scramble" Side Story: "Hajime Nojima's Ordeal" |||||
| 21 | October 5, 2023 | 978-4-06-533089-0 | February 11, 2025 | 979-8-88-877047-4 |
| 82. "A True Striker" 83. "Serving Herself Up" 84. "Reminiscence!" 85. "Halloween" |||||
| 22 | April 5, 2024 | 978-4-06-535017-1 | ー | — |
| 86. "No Reaction Game" 87. "Wakeboarding!" 88. "Assassin" 89. "Sakurako Busujima" Side Story: "Drunken Ping-Pong" |||||
| 23 | October 7, 2024 | 978-4-06-537098-8 | ー | — |
| 90. "Presentation" 91. "Inspection!" 92. "Izu Fall Festival!" 93. "Entry!" 94. "Answer" |||||

### Anime

An anime television series adaptation was announced in March 2018. The anime series is written and directed by Shinji Takamatsu, with Takamatsu also handling the sound direction, Zero-G produced the animation and Hideoki Kusama designed the characters. It aired for 12 episodes from July 14 to September 29, 2018, on the Animeism programming block on the JNN-affiliate station, including MBS, TBS, and BS-TBS, and on AT-X. The opening theme song is "Grand Blue", performed by Shōnan no Kaze, while the ending theme song is "Konpeki no al Fine" (紺碧のアル・フィーネ), performed by Izu no Kaze (a group formed by Yūma Uchida, Ryohei Kimura, Hiroki Yasumoto, and Katsuyuki Konishi). The first season was streamed exclusively on Amazon Video worldwide.
In September 2024, a second season was announced, with Takamatsu returning as director and scriptwriter and Liber joining Zero-G as animation studios. It is set to premiere on July 8, 2025, on Tokyo MX and BS11, and will also air on MBS. The opening theme song is "Seishun Towa" (青春永遠, lit. 'Eternal Youth'), performed by Shōnan no Kaze.

### Film

A live-action film adaptation was announced in November 2019. It was directed by Tsutomu Hanabusa, and originally scheduled to release on May 29, 2020; however, it was postponed to August 7 of that same year, due to the COVID-19 pandemic. SAF Movie Reviews rated it 75 out of 100 and praised the movie as a surreal feel good comedy.

## Reception

By April 2023, the manga series had over 8 million volumes in circulation.