The official website for the television anime adaptation of Ark Performance's science-fiction naval manga Aoki Hagane no Arpeggio (Arpeggio of Blue Steel) began streaming the fourth promotional video for the anime on Friday. The video features the the series' opening theme song "Savior of Song" performed by Nano and My First Story.

The anime is scheduled premiere on the MBS and TOKYO MX channels in October. The opening theme song's single CD will ship in Japan for 1,100 yen (about US$11) on October 30.

The series features four ships with female Mental Models (physical incarnations in humanoid form): Manami Numakura as Takao, Hibiku Yamamura as Haruna, Yumi Uchiyama as Kirishima, and Yukana as Kongō. Kazuyuki Okitsu plays Gunzō Chihaya, the captain of the I-401 submarine. Mai Fuchigami plays Iona, the Mental Model of the I-401 .

In the story, humanity lost much of its developed land due to global warming in the first half of the 21st century. Then, a "Fleet of Fog" loaded with super weapons suddenly appears all over the world. Without the ability to withstand this fleet, humanity was defeated and could no longer travel the seas. 17 years after the devastating naval war, Gunzō Chihaya and his friends somehow commandeer a "Fleet of Fog" submarine named I-401 . Together with Iona ( I-401's "mental model" or physical incarnation in humanoid form), they take on the "Fleet of Fog."