Yokosuka Girls' Marine High School buzzes as it opens its doors to other all‑girls maritime schools for interschool competitions. Excitement swirls as students from each grade mingle and collaborate while festivals and matches kick off.
Meanwhile, Akeno Misaki—captain of the esteemed Harekaze class—and her executive officer Mashiro Munetani feel a mix of emotions when their instructor reveals that Mashiro could assume leadership of the Hiei class. Mashiro must weigh loyalty to Harekaze against the new opportunity. Consequently, Mashiro must decide quickly, and Akeno must grapple with the emerging dilemma.
A new crisis hits Yokosuka when a band of pirates seize a water‑purification plant and a sea fortress, endangering maritime safety. The raid threatens maritime safety, prompting urgent action. Now Akeno and Mashiro must steer the Harekaze class through this perilous situation, all while confronting their own personal struggles. They remain determined to protect peers and uphold the school's honor.
