Kukuru Misakino is a 18-year-old girl who works at an aquarium and she encounters a former idol who lost her place in Tokyo and escaped to Okinawa named Fuuka Miyazawa. Kukuru and Fuuka spend their days at the aquarium, their hearts filled with their own passions. But their precious place is about to be shut down forever. The girls face their dreams and reality, loneliness and friendships, bonds and conflicts... This summer is about to turn a glimmering, new page. 
 
(Source: Crunchyroll)

The story takes place at Gama Gama Aquarium, a small aquarium in Okinawa, an hour's bus ride from Naha. Kukuru Misakino is an 18-year-old high school student who works there, and she knows about the "secret" of the aquarium: sometimes you can see mysterious things. One day Kukuru meets Fuuka, standing in front of a water tank with flowing hair and a tear rolling down her cheek. Fuuka has given up on her dream of becoming an idol and she has run away from Tokyo to Okinawa. Wanting to find a place to belong, Fuuka earnestly asks to work at the aquarium. The story follows Kukuru and Fuuka as they deal with the issues of the secret of the aquarium and a looming crisis of its possible closure.
 
(Source: Anime News Network, edited)

Mini animations posted on the Shiroi Suna no Aquatope Twitter account.

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