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]+ More
Characters & Voice Actors

Iona
Main
Haruna
Supporting
Hozumi, Shizuka
Supporting
Hyuuga
Supporting
I-400
Supporting
I-402
Supporting
Kamikage, Ryuujirou
Supporting
Kashihara, Kyouhei
Supporting
Kirishima
SupportingRecommended for you
Arve Rezzle: Kikaijikake no Yousei-tachi
Movie
24m
Bakugan Battle Brawlers
TV
24m
Godzilla: The Planet Eater
Movie
90m
Hitori no Shita: The Outcast Recap
Special
24m
Saint Seiya Omega
TV
23m
Haiyoru! Nyaruani
OVA
2m
Rhea Gall Force
OVA
57m
Yurumates 3D
TV
3m
Ozanari Dungeon: Kaze no Tou
OVA
26m
Silent Mobius: The Motion Picture 2
Movie
59m
Tekkaman Blade II
OVA
30m
Project A-ko: Uncivil Wars
OVA
51m
Togainu no Chi
TV
24m
[RAW] Dangard Ace
TV
25m
AD Police Files
OVA
27m