Marika is a first year high school student living on a planet known as Uminoakeboshi. One day she finds out that her recently deceased father was once the captain of the space pirate ship called the "Bentenmaru". More importantly, the only one to inherit the captain's title has to be a direct descendant, meaning that Marika is next in line to become the captain of the ship.
Noriko Takaya's dream is to become a space pilot like her father, Admiral Yuzo Takaya. He died when she was still a little girl due to an attack of alien forces in deep space. After entering Okinawa Girls Space Pilot High School, Noriko is handpicked by instructor Kouichiro Ohta as someone with great potential. She must then persuade everyone, especially herself, that she can indeed fulfill her goal and become an accomplished pilot despite being just an ordinary girl.