Young mecha pilot Tetsuo survives the last great battle against an alien horde. His escape pod lands on Earth eight years later, but his homecoming is not what he expected!

In the year 2025, huge beasts from beyond the galaxy attacked Earth. In the war that followed, humanity fought back with a giant robot named Yukio, piloted by Tetsuo Yabusame. As the massive alien swarm closed in on humanity’s homeworld, Tetsuo and the Earth Defense Force deployed for the final battle with the invading horde. They lost…

Humanity has finally obtained its trump card in the form of Snowman Pandora, and its power seems to overwhelm even the continent destroyer Gold Coast! However, just as Tetsuo and Yukio try to ride the momentum and secure their win, Gold Coast unleashes his true power. With defeat looming, Tetsuo begins to fall into despair, but his friends help shine a light toward victory!