Aoi Musashino serves as a space attendant for Cetacea Aviation in a future where space travel is routine. Her duties demand proficiency in hand-to-hand combat to neutralize hijackers exploiting their bodies as weapons aboard interstellar flights. Despite this role, she personally identifies as a "clumsy, awkward, but cute turtle," reflecting her own perception of inadequacy within the position. Her journey involves interactions with fellow space attendant Yasaki, who is transitioning from local to interstellar routes, and a boy named Laika, who carries the belief that his songs bring misfortune to others. The available details originate solely from the 2019 movie.