Arpeggio of Blue Steel -Ars Nova DC-

Following global warming and rising sea levels in 2039, a mysterious group of warships known as the Fleet of Mist emerged to conquer the oceans. These ships destroyed human trade and political stability through superior force. Seven years later, a submarine from this enemy fleet called I-401 appears before cadet Gunzo Chihaya. Rather than attacking, the humanoid entity controlling the vessel offers to help humanity. Gunzo and his companions join the defector, known as Iona, to form a group called Blue Steel. Together, they fight to secure a prototype weapon that represents humanity's best chance for survival.

Directed by Seiji Kishi, this science fiction action film was released in 2015. It follows Kishi's work on Fate/Prototype and Aura: Koga Maryuin's Last War, and precedes his 2016 projects including Assassination Classroom the Movie: 365 Days' Time, Koro-sensei Q!, and Danganronpa 3: The End of Hope's Peak Academy - Hope Arc. Produced by Sanzigen, the animation features a voice cast including Kazuyuki Okitsu, Mai Fuchigami, Manami Numakura, Suzuko Mimori, Jouji Nakata, and Hiromi Igarashi.

The film functions as a recap of the Ars Nova television series, incorporating roughly 40 minutes of original content. It has received a rating of 6.3/10 on IMDb based on 104 votes and a higher score of 7.1/10 on TMDB from 18 votes.