Fuka wanders off to Okinawa after quitting her idol job in Tokyo. There, she meets Kukuru, who is the director at Gama Gama Aquarium.

Kukuru and the crew brainstorm for ways to attract more visitors to Gama Gama Aquarium. They decide to try selling some sweets.

Fuuka has returned to Okinawa to find a dejected Kukuru, struggling to do well at work.

A dolphin is lost in the waters near Tingarla. Kukuru is eager to check up on it, but she is busy preparing for an upcoming project proposal, so the staff take turns visiting the dolphin.

Aquarium Tingarla is hard at work preparing to carry out the aquarium wedding project that Kukuru spearheaded.