The battle for Ragna begins as Delta squad and the rest of Chaos go on the offensive. With Windmere on the front and NUNS breathing down their neck, saving the people becomes the people becomes the top priority.

​Using the power of the Wind Singer and their Protoculture ship, the Aerial Knights capture Al Shahal in mere minutes. Ragna is their final target, and Delta Squad must prepare their defense while dealing with NUNS interference.

The crew says goodbye to Messer, but there is little time to grieve. The Aerial Knights are ready to play their trump card, setting the stage for an incredibly high stakes battle.

The squad attends the Jellyfish Festival on Ragna, a traditional event for couples. Messer is re-assigned to a training position where he can be safe, but with another attack from the Aerial Knights his absence is immediately felt on the battlefield.

Mirage and Hayate learn more about Messer’s past and his current condition. They try to convince him that he could be danger to everyone on the battlefield, but they are interrupted by another attack from the Aerial Knights.

Freyja, Mirage, and Hayate are captured by the Aerial Knights while Messer and the rest of Walkure are still stuck behind enemy lines. Delta Squadron arrives to rescue them, but the group must fight their way out.

Walkure and Delta Squadron go undercover on a nearby planet recently occupied by Windmere. They learn more infomation about the Vars outbreaks, but Freyja, Hayate, and Mirage get separated from the group.

Freyja and Hayate bristle under their respective authorities as they continue their training. Not even Mirage escapes criticism as she has to deal with expectations of her lineage. They must put that aside as Delta Squadron heads into battle, and with lives on the line they need to be sure they know what they’re fighting for.

With Windmere’s declaration of war, Delta’s contract has changed to include helping defend Ragna, essentially declaring war themselves. All eyes are on Freyja as she decides if she will turn against her planet, even as some accuse her of being a spy. Hayate must also decide if he wants to continue to fight now that real combat is on the horizon.

Walkure performs a pre-emptive concert to prevent a Vars outbreak. Things are going well enough for Freyja and Hayate in their performance debut, but it’s only a matter of time before the spectacle draws the attention of their mysterious enemy.