Marika learns about a mysterious ship has been hunting down the space pirates recently. Despite the threat they face by the "pirate hunters", Marika tells her crew they will still do one more job to renew their privateer license before her exams. At the same time, the space yacht club prepares a final practice cruise for Lynn and the third-years, who are due to graduate and leave Marika as the next club president. Thanks to Show, the Bentenmaru is assigned to escort the pirate ship Big Catch and its fleet. Soon, the space pirates are attacked by the pirate hunters, who easily destroy the fleet using their superior weaponry and incredible maneuverability. As Marika orders the Bentenmaru to escape, another mysterious ship appears.