High School Fleet

In a world where the majority of Japan has been submerged, maritime academies have become paramount, training young women to protect the seas. Among them is Yokosuka Girls' Marine High, home to Akeno Misaki and her friends, whose dreams of becoming "Blue Mermaids"—elite protectors of the ocean—are finally within reach. Their first training voyage aboard the destroyer *Harekaze* begins like any other, a standard exercise meant to hone their skills. However, a sudden, inexplicable shift in their instructor's behavior, followed by a mysterious order to fire upon them, plunges the *Harekaze*'s crew into an unexpected battle for survival. Now branded as mutineers and adrift in treacherous waters, Akeno and her inexperienced crew must navigate a world suddenly turned against them, relying on their wits and burgeoning camaraderie to uncover the truth and clear their names.

✦ AI-drafted summary