One day, a mysterious passage appeared in Antarctica.
No one knew when that passage had appeared. It was not until thirty years ago, when a mysterious alien entity known as JAM emerged from it and attacked humanity, that people discovered its existence.
After a grueling battle, humanity wiped out the JAM that had invaded Earth and followed the passage to the planet where the JAM resided. They built a frontline base there to stop the JAM from attacking Earth again. To humanity, this extraterrestrial frontline base was a defensive fortress against the JAM. Thanks to those stationed there, the people on Earth beyond the passage could continue living as peacefully as they had before.
Yet while those people laughed and drank away their days on Earth, they had no idea what kind of battles the soldiers at the frontline base were enduring.
Roaring fighter jets streaked across the sky toward the distance. Below them lay a pure white desert and pale violet grasslands—scenery that could never be seen on Earth.
Yet danger was brewing within it.
Because this was the B7R war zone.
"------!!"
Just as the formation of fighters flew over the desert, the white sands suddenly erupted. One black object after another, resembling Surface-to-air missiles, burst out from beneath the ground and shot toward the fighter formation overhead. But they were not merely missiles. In midair, the black projectiles detached their boosters, spread their wings, and transformed from pointed cones into shapes resembling caltrops as they launched their attack on the fighters.
These were the JAM. Even now, humanity had no idea what they truly were or why they attacked mankind. But regardless, these monsters were humanity's enemies.
Therefore, there was only one objective... utterly destroy them.
"This is Squad 666 of Filia Base. Prepare to engage!!"
With