خلاصه داستان :

Living by the sea, protecting the sea, and journeying across the sea... They're the Blue Mermaids! Because of a shift in tectonic plates around 100 years ago, Japan lost much of its area to submergence. To preserve Japan's territories, coastal cities sprung up, one after the other. Eventually, they became marine cities, and along with the expansion of sea-lanes to connect them, the need arose for a sizable staff to protect the seas. At the same time, maritime jobs were becoming more popular among women. Hence, the Blue Mermaids, tasked with keeping the seas safe, had become every female student's dream job. This is when childhood friends Akeno Misaki and Moeka China enroll in a marine high school in Yokosuka, along with other girls who share their goal of becoming a Blue Mermaid.

خلاصه داستان : در اوایل قرن بیستم، کشف ماده‌ی «کاویت» (Cavorite) منجر به تولید تکنولوژی پیشرفته‌ی نظامی شد و کشور را به سمت درگیری سوق داد. لندن اکنون با یک دیوار تقسیم شده است و پادشاهی و مشترک‌المنافع آلبیون درگیر یک جنگ خاموش هستند که جاسوسی تنها سلاحی است که می‌تواند دشمن را بی‌ثبات کند. گروهی از دختران...

The stage is set during the 19th century London, in its capital where a wall divides the east and west of the Kingdom of Albion. Five high school girls, who enrolled in the prestigious Queens May Fair School, are involved in spy activities that involve disguise, infiltration, car chase, and more. These girls take advantage of their special abilities and fly around the shadow world.