The anime 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 anime follows Kukuru and Fuuka as they deal with the issues of the secret of the aquarium and a looming crisis of its possible closure.
在水族館工作的 18 歲女高中生・海咲野くくる ，與失去了東京居住場所並且正在避風頭的原偶像・宮沢風花 互相相遇。
くくる 與 風花 兩人內心懷著各自的想法，在水族館度過了每一天。但是，那最重要的地方正面臨著閉館的危機。少女們的夢想與現實、孤獨與夥伴、羈絆與衝突──。