Seasons and episodes
1Season 1 Jul. 14, 2018
1 - 1Deep Blue Jul. 14, 2018
1 - 2Underwater Jul. 21, 2018
1 - 3A New World Jul. 28, 2018
1 - 4The Male Beauty Pageant Aug. 04, 2018
1 - 5Too Late Aug. 11, 2018
1 - 6First Buddy Aug. 18, 2018
1 - 7Doubles Aug. 25, 2018
1 - 8Men's Cocktails Sep. 01, 2018
1 - 9Truth or Dare Sep. 08, 2018
1 - 10Arrival in Okinawa Sep. 15, 2018
1 - 11You Have the Wrong Idea Sep. 22, 2018
1 - 12Otori Sep. 29, 2018
2Season 2 Jul. 08, 2025
2 - 1Sister Jul. 08, 2025
2 - 2Brother Jul. 15, 2025
2 - 3Episode 3 Jul. 22, 2025- 2 - 4Episode 4 Jul. 29, 2025
- 2 - 5Episode 5 Aug. 05, 2025
- 2 - 6Episode 6 Aug. 12, 2025
- 2 - 7Episode 7 Aug. 19, 2025
- 2 - 8Episode 8 Aug. 26, 2025
- 2 - 9Episode 9 Sep. 02, 2025
- 2 - 10Episode 10 Sep. 09, 2025
- 2 - 11Episode 11 Sep. 16, 2025
- 2 - 12Episode 12 Sep. 23, 2025
Creator
Cast
Iori Kitahara (voice)
Kouhei Imamura (voice)
Chisa Kotegawa (voice)
Aina Yoshiwara (voice)
Azusa Hamaoka (voice)
Nanaka Kotegawa (voice)
Ryuujirou Kotobuki (voice)
Shinji Tokita (voice)
Synopsis
When Iori Kitahara heads off to college, he decides to live at his uncle’s dive shop in Izu named Grand Blue. Iori is looking forward to experiencing college life amidst the roar of the waves, the blazing sun, and his cute cousin who lives with him! However, Iori runs into a group of tough guys playing strip rock-paper-scissors, and ends up joining Peek-a-Boo, the college’s diving club! 
Original title ぐらんぶる
TMDb Rating 7.7 131 votes
First air date Jul. 14, 2018
Last air date Sep. 29, 2018
Seasons 2
Episodes 24
Average Duration 24 minutes
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