劇場版 ハイスクール・フリート

Akeno Misaki is back on the bridge with Mashiro Munetani as her executive officer, and Yokosuka Girls' Marine High School has entered them in an interschool competition rather than anything they would call a mission. Then pirates take a water purification plant and the sea fortress attached to it, and the crews training to become Blue Mermaids are the ones on the water. This feature follows the television cast rather than restarting them, with the ship's own quarrels running alongside the seizure.