Hina Tsurugi and her family have recently relocated to a charming beach village. Hina comes onto a girl called Yuuki Kuroiwa—an upperclassman at her new school—who encourages Hina to join her in fishing in order to relish the sight of the serene ocean. Hina pulls in an octopus, which falls across her; terrified of bugs and large monsters, she asks Yuuki to remove it. Yuuki views this as a chance to compel Hina to join the school's Breakwater Group, a club whose major activity is gathering, catching, and eating various species of aquatic life. Despite her attempts to resist to participate, Hina gradually discovers the secret delight in fishing. Her perspective on the sport has shifted, and she is now looking forward to it.