High school sophomore Yukina Shirahane witnesses a mecha attack on her mother's research institute and is rescued by a boy who acts like a samurai.

1. A Rain of Ogres from the Sky 24m Yukina, a sophomore at Tateyama High, visits Kurobe Laboratory when it is suddenly attacked. While escaping, she touches a mysterious cube.

2. The Black Shell Awakens 24m Kennosuke Tokisada Ouma appears from the cube. He tries to save Yukina but is knocked unconscious. A new large scale geoframe emerges from Toyama Bay.

3. The Silent Walls of a Castle Ruins 24m Kennosuke, with Yukina along for the ride, is victorious, but the enemy geoframe gets away. He is captured once again but escapes and finds Koharu.

4. A Strange, New World 24m After realizing the extent of his slumber, Kennosuke is invited by Yukina's uncle to live with the family. The modern world continues to confound him.

5. The Samurai Goes to School 24m Yukina returns to school, hoping life is finally going back to normal -- only to be horrified when she catches a glimpse of the new transfer student.

6. Face-Off at Jinzu River 24m Ken and Yukina resume their battle with the Yellow Crab mecha. Classmates Akagi and Kayahara defy the authorities and head closer to the battle zone.

7. Vanishing into the Dawn 24m After the Yellow Crab's pilot takes his own life, Yukina loses her will to fight. At school, she hears that Akagi and Kayahara are still missing.

8. Memories of Regret 24m As the invaders’ demands cause friction, Yukina leaves home to avoid battle. Kennosuke goes to search for her but realizes he knows nothing about her.

9. The Ogre's Message 24m An enormous enemy geoframe appears, but with Yukina missing, the center lacks the power to oppose it. Ken, Akagi and Kayahara continue the search.

10. The Arrogant Captive 24m The captured pilot is taken back to the research center and questioned. He says that he came to find a certain object. Ken appears to recognize him.

11. Truth Shrouded in Darkness 24m The enemy pilot unexpectedly escapes and is able to restore his geoframe. Yukina is ordered to deploy in the Kuromukuro, but runs into him on the way.

12. Summer Hell Camp in Kurobe 24m Summer vacation has come, and that means more training for Ken and Yukina, who is improving more than she expected. Akagi hopes to become a pilot.