High School Fleet OVA
Genres: Action
Type: OVA, Episodes: 2
Aired: Mar 31, 2017 to May 24, 2017
Studio: Production IMS
Source: Original
Rating: PG-13 - Teens 13 or older
Synopsis:
The mutinous Musashi has been defeated, and the girls from Yokosuka Girls' Marine High School are safely back home. However, the Harekaze sustained critical damage during its final encounter with the Musashi and may not be able to sail again. Moreover, rumors spread that the Harekaze-class will be dissolved due to it lacking a ship. 

Other classes' attempts to scout members from the Harekaze's crew only make the situation even more uncertain. The answer to this dire problem may be found in the sealed orders that the secretary of the Harekaze, Kouko Nosa, is to deliver to its crewmembers. But time is running short...