After being wrongfully terminated from the Investigations Agency of Polaris, the protagonist finds himself blacklisted from every piloting position he applies for. With his ill sister dependent on his income and his name still under a cloud, he joins the mercenary vessel Aetos as the only option left. The ship's crew — stoic captain Iris, cheery engineer Vaela, warm-hearted doctor Luna, and suave navigator Kai — operate across multiple star systems. Your choices shape mission outcomes and determine how relationships grow, and possibly bloom into romance.