Hailing from a rural community in the Martian countryside, Nono is a simple and clumsy girl with a big dream: she wants to be a space pilot. And not just any space pilot, but one to rival 'Nono-Riri'. Of course, dreaming of being a pilot and actually becoming one are two entirely different things, as she soon finds out upon reaching the city. Even after landing a somewhat dead-end job as a waitress in one of the city's bars, Nono stubbornly holds on to her ideals, despite the chiding of her boss and the bar's regular patrons. Her persistence pays off, however, when she encounters a real space pilot in the person of Lal'C Mellk Mal, member of the elite Fraternity and current pilot of Buster Machine Dix-Neuf. It is through Lal'C (whom she impulsively dubs her Oné-sama, or big sister) that Nono finally finds the means to make her dreams a reality.