In this naval fleet-building simulation game, players step into the role of admiral, training and developing a formidable fleet comprised of kanmusu fleet girls -- moe anthropomorphisms of real-life destroyers, light cruisers, heavy cruisers, battleships, and other warships. The game’s servers are named after actual Japanese naval bases such as Mutsu in Aomori Prefecture, Yokosuka in Kanagawa Prefecture, Maizuru in Kyoto Prefecture, Kure in Hiroshima Prefecture, and Sasebo in Nagasaki Prefecture, locations that have become pilgrimage sites for fans of the title.