Aoki Hagane no Arpeggio: Ars Nova
English title: Arpeggio of Blue Steel -Ars Nova-
Japanese title: 蒼き鋼のアルペジオ ‐アルス・ノヴァ‐
Alternative titles: Aoki Hagane no Arpeggio: Ars Nova
Type: TV
Source: Manga
Episodes: 12
Status: Finished Airing
Aired: Oct 8, 2013 to Dec 24, 2013
Broadcast: Tuesdays at 02:55 (JST)
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older
Studios: SANZIGEN
Producers: Sotsu, KlockWorx, flying DOG, Ultra Super Pictures, Showgate, Shounen Gahousha
Licensors: Discotek Media, Crunchyroll
Genres: Action, Sci-Fi
Demographics: Seinen

In the year 2039, the drastic effects of global warming have caused sea levels to rise, resulting in major loss of land. To ensure humanity learns its lesson, a fleet of powerful warships equipped with advanced weaponry emerges, causing overwhelming defeat for naval forces throughout the world. Calling themselves the Fleet of Fog, each ship has a "Mental Model," a humanoid avatar which represents the ship's heart, its "Union Core." Each model has a different personality but all follow an unknown authority known as the Admiralty Code, who have implemented a blockade to prevent humans from traveling across the sea.
 
Seventeen years after the blockade, Gunzou Chihaya, a National Marine Academy alumnus, stumbles upon I-401 and its Mental Model, Iona, who sides with mankind for unknown reasons. Utilizing this newfound hope of achieving peace for humanity, Gunzou and his friends form a group of privateers, known as the Blue Steel, as they set out on a dangerous journey.

[Written by MAL Rewrite]

Episode 1 was previewed at a screening in Oosaka on September 21, 2013. Regular broadcasting began on October 8, 2013.