The crew of Spearhead find themselves back on the battlefield, as the tide of the war turns against the Federacy.

As the war with the Legion rages on, the enemy makes a final march towards the Republic of San Magnolia. Lena waits to stop them, but...

The operation to destroy the Morpho was a success, and Shin and his team fulfilled their promise to return to the Federacy alive. After enjoying a brief respite, they once again wished to serve in frontline units, but they received a certain notice from Ernst. After crossing the deadly battlefields of the Republic, they arrived at a new meeting in the Federacy. They fight, suffer, and see a ray of hope. This is a story of boys and girls who have begun to move little by little. At the end of their journey, what is reflected in their eyes?