Recap of the Aoki Hagane no Arpeggio: Ars Nova TV sequence, with roughly 40 minutes of recent materials. By 2039, international warming had triggered sea ranges to rise and great amount of territory to be misplaced. As if in response, a mysterious group of warships clad in mist, “the Fleet of Mist,” appeared in each nook of the ocean, and started attacking human ships. Despite humanity mustering all their energy, they have been completely defeated by the Mist’s overwhelming drive. All of humanity’s commerce routes have been blockaded by the Fleet of Mist, their political financial system was destroyed, and the human race was steadily crushed down. Seven years later, the Fleet of Mist’s submarine I-401 seems earlier than cadet Gunzo Chihaya. The humanoid life kind that pilots the sub, who ought to be their enemy, is as an alternative providing her providers to mankind.