In the far future where s.p.a.ce travel and colonialization have become the norm, humanity has expanded its living s.p.a.ce to the far reaches of the known galaxy. Due to legalization from the govermental body, post-war s.p.a.ce Pirates activities are now reduced to more legal jobs (like errand running and staging raids for the entertainment of s.p.a.ce travellers). The cessation of illegal activities is gradually causing them to pa.s.s into local legend. Marika Kato is a high school girl living a rather ordinary life as a member of the s.p.a.ce yacht club and a part-time job at the high-cla.s.s retro Lamp Café. One day, Marika learns of her recently deceased father, Gonzaemon, who is revealed to have been a s.p.a.ce Pirate. In order for her father’s s.h.i.+p, the Bentenmaru, to continue legal operation, Marika, Gonzaemon’s direct descendant, is chosen to become the s.h.i.+p’s new captain, thus beginning her life as a s.p.a.ce Pirate.