"The aquatope on white sand" mini anime posted on the show's official Twitter account.

One day, 18-year-old aquarium employee Kukuru Misakino encounters Fuuka Miyazawa, a former idol who lost her place in Tokyo and escaped to Okinaka.

Kukuru and Fuuka spend their days at the aquarium, their hearts filled with their own passions, but the aquarium is struggling and 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; emended]