Part One Sirius, Spica, and Vega Platoons are sent to investigate when SDF headquarters loses contact with the 323 Express. There they find the train torn apart by an explosion and lifeless bodies floating in space. After having a panic attack, Manabu is sent to back to the Big One where he watches as Yuki tries and fails to save the life of a child. A distraught Manabu yells and grabs Yuki, begging her to do more for the child. Captain Bulge, who witnessed the attack, suspends Manabu indefinitely. While on suspension, Manabu begins to wonder if he has what it takes to be a member of the Space Defense Force.