Soukyuu no Fafner: Dead Aggressor - All Seasons

Terrorized by a hostile alien race's mental warfare, humans hear only this question just before their lives-essentially their minds-are assimilated by the violent invaders. Kazuki and his classmates lay everything on the line to pilot their heavily-guarded island's secret weapons: towering mechs for which only they are genetically qualified to control. With most of Earth destroyed, humanity's survival relies on these youths' selfless determination to protect the only home they know. But when each battle pushes the pilots to the brink of assimilation, who will protect them?

Two years have passed since the battle in the Antarctic. Fragments of the Arctic "Mir" have been scattered all over the planet. There are now a total of seven "Mir" on the planet, which continue to learn emotions from humans and thus influence their life forms, the Festum.@@The world is thus at war. Only the island of Tatsumiya tries to stay out of it as far as possible because the inhabitants are trying a kind of coexistence with their own "Mir". At some point, this calls General Narain onto the scene, who strives for something similar. Through the girl Emery, who can communicate with the "Mir", he learns of Miwa, who also possesses this ability. From her, he hopes to make contact with a new "Mir", Altair, which is on its way to Earth and can massively disturb the balance. However, when Miwa arrives at Ashoka the World Tree, the "Mir" in Narain's care, the base is attacked. As a result, the "Core" of the "Mir" of Tatsumiya Island awakens again and sends Kazuki, Soushi and their friends into battle once more. But for this, they have to activate "Mark Sein" and "Mark Nicht" again …@@At the same time, however, it becomes apparent that the Human Army, which is actually an ally, does not seem to pursue the same goals. Thus, a fight among humans is also imminent!

The people of Alvis need Soushi's help, since he is the only one that can lead them back to their homeland of Tatsumiyajima. But a group called Benon, who are a combination of Festum and Perseus-type Fafner's, are fighting to prevent this.