In a distant corner of the Laniakea Kingdom, humans live alongside powerful beings with strange tails known as dragonfolk. A girl named Jio, whose father has forbidden her from leaving the remote island where they live, yearns to escape the confines of this quiet countryside and explore the world. Everything changes in the moment when Jio meets the mysterious Nereid, who claims to have lost all his memories. The revelations keep coming, as Jio realizes that her father's kept her hidden because the whole world is hunting her, setting Jio and Nereid on a path to find the world's most intrepid explorer, Yuri Holst. Could this living legend be the solution to Jio's problems? Strange lands and uncharted waters await… Let the grand adventure begin!