Recap of the Aoki Hagane no Arpeggio: Ars Nova TV series, with approximately 40 minutes of new material.
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.
(Source: ANN)+ More
Characters & Voice Actors

Chihaya, Gunzou
Main
Okitsu, Kazuyuki
Japanese
Iona
Main
Fuchigami, Mai
Japanese
Ashigara
Supporting
Mimori, Suzuko
Japanese
Chihaya, Shouzou
Supporting
Nakata, Jouji
Japanese
Haguro
Supporting
Igarashi, Hiromi
Japanese
Haruna
Supporting
Yamamura, Hibiku
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