Kaijuu no Kodomo S01

On a summer holiday, Ruka sees Umi and Sora, who bring with them secrets and wonders. She becomes fascinated with their beautiful swimming, which is almost like flying. Ruka and the adults who know them get entangled in complicated events... Meanwhile, an unusual and inexplicable phenomenon occurs all over the world: the fish disappear. Thus, a sea adventure that deceives all senses begins.