Mari Wakatake has been living with her Grandmother for the past 5 years after a tragedy caused the loss of her home, friends and family, as well as her memories. Fearing for her future, her Grandmother admits her into Kaihou Academy, for her to make friends, instead of home studying. Although reluctant to go, she does and meets Hagino Sekonji. At first appearance, this girl appears like a normal student but inside her lies a deep secret that relates to the tragedy of 5 years ago.
Episode 1
Mari Wakatake has been persuaded to attend Kaiho Academy. Upon her arrival, the headmaster is informed that five years ago, Mari was in an accident and lost all of her memories.
Episode 2
Disturbed by what she saw the night before, Mari has a dream about drowning and the alien ship.
Episode 3
Hagino is needed back on her ship, Blue, so she leaves the school. Mari can't stop thinking about Hagino.
Episode 4
Hagino explains to her Commander that there was a malfunction in the ship?s Emiru Force Drive, which knocked out communications and caused the accident on Kamioki Island.
Episode 5
Hagino and Tsubael explain the situation to Mari. Hagino refuses to hand over Mari. Blue is attacked.
Episode 6
Mari and Yuko are attacked in the woods by Azaneal.
Episode 7
Hiroko has invited the girls over to her house but the girls end up babysitting her neice since her Sister has gone into labor.
Episode 8
Michiko is trying to work on the script for the school play, but is experiencing writer?s block. The stress becomes too much for her, and she runs away.
Episode 9
Mari and Hagino go to town to pick up materials for the play. Mari has an accident on the way home.
Episode 10
Michiko has been appointed the plays director. Mari feels self-conscious in her role, especially opposite Haginos strong performance. Hagino, admiring Michikos display of openness in the play, brings Mari onto Blue for a fun ride. However, after the ship begins to have technical issues, Azaneal reveals to Mari painful details about the accident five years prior and who was to blame.
Episode 11
Mari does not want to participate in the play anymore. As Hagino is crying a specter of Onomil appears and tells her not to continue blaming herself.
Episode 12
Hagino tells Yuko about the coming Arume invasion and her hopes to protect the planet.
Episode 13
The invasion begins and the human defense forces are no match for the new Arume weapon. Blue joins the fight and destroys several enemy ships.
