The geo-political stakes are raised when the Amaterasu arrives on the planetary nation of Shu. As the Former Prime Minister Mamiya appeals to Shu's government for support, Shinon and the female crew revel in their reality-television celebrity status on the most popular show in the galaxy. But their joy is brought to a grinding halt when a revolutionary force stages a sudden coup d'etat and uses Shinon and Amatersu's crew as a tool for negotiation.

With the Kingdom's negative campaign against Amaterasu gaining galaxywide support, even AGI decides to end their sponsorship. Cut off from any supplies and badly damaged from endless battles, Amaterasu goes into the final battle against Kingdom's five elite battleships on her own.

For the 73rd class of cadets of the Defense University of the small planet Kibi, a maiden voyage on the new warship Amaterasu is a fitting event just before graduation. As they are returning home, however, they are shocked to hear news of a declaration of war by the aggressive Kingdom of Henrietta against Kibi.