By 2039, global warming had caused sea levels to rise and large amount of territory to be lost. As though in response, a mysterious group of warships clad in mist, “the Fleet of Mist,” appeared in every corner of the ocean, and began attacking human ships. In spite of humanity mustering all their strength, they were utterly defeated by the Mist's overwhelming force. All of humanity's trade routes were blockaded by the Fleet of Mist, their political economy was destroyed, and the human race was steadily beaten down. Seven years later, the Fleet of Mist's submarine I-401 appears before cadet Gunzo Chihaya. The humanoid life form that pilots the sub, who should be their enemy, is instead offering her services to mankind.

Cast

Kazuyuki Okitsu

Gunzou Chihaya (voice)

Mai Fuchigami

Iona (voice)

Minami Tsuda

Iori Watanuki (voice)

Shinobu Matsumoto

Sou Oribe (voice)

Eiji Miyashita

Kyohei Kashihara (voice)

Nao Toyama

Shizuka Hazumi (voice)

Saki Fujita

Hyouga (voice)

Manami Numakura

Takao (voice)

Atsushi Ono

Ryokan Kita (voice)

Hibiku Yamamura

Haruna (voice)

MAKO

Maya (voice)

Nozomi Yamamoto

I-402 (voice)

Rina Hidaka

I-400 (voice)

Ryotaro Okiayu

Kamikage Ryuujirou (voice)

Sayuri Hara

Makie Osakabe (voice)

Yukana

Kongou (voice)

Yumi Uchiyama

Kirishima (voice)

Jouji Nakata

Narration (voice)

Rikako Yamaguchi

Maid A (voice)

Rika Nishimori

Maid B (voice)

Seasons

12 episodes

Season 12013 · 12 episodes