The story takes place at a small aquarium in Nanjo City, Okinawa Prefecture, which is about to close. The acting director "Umi Sakino Kukuru (CV: Ito Miku)" and the girl "Miyazawa Fuuka (CV: Aida Rikako)" who gave up her dream in Tokyo meet here. In order to keep the aquarium open, they work together. The story describes the girls' bond and growth through their work at the aquarium.