OVA - Kouko Nosa Still in a Pinch!?

Worried that the sealed orders dissolves the Harekaze class, Coco launches a petition to prevent it. Coco goes around asking for signatures with little success. After asking Minami, she decides to hold a special event to draw in people to sign it. Coco and her classmates set up a festival and the event is successful. At the designated time, the class assembles to open the sealed envelope, and the orders state that the class has been reassigned to a new ship, the Y469.