Arpeggio Of Blue Steel: Ars Nova - Dc

In a near future, the mysterious Fog Fleet appears on the world's oceans, a faction of thinking high-seas warships and submarines, declaring war on humanity for unknown reasons. Many of the ships have their own personalities, known as Mental Models, which can take physical form as female avatars of their ships. However, due to the superior technology of the Fog, it is a highly uneven battle, and humanity must increasingly retreat. Seventeen years later, naval officer cadet Chihaya Gunzo awakens the Fog Fleet submarine I-401, and the Mental Model Iona appears. She has the surprising mission to obey Gunzo's orders. Together, Iona, Gunzo, and his mercenary crew, the Blue Steel, take up the fight against the Fog.