Humanity has advanced into the cosmic era and has finally, inevitably, encountered a powerful hostile civilization. The invasion of extradimensional combat creatures has brought unimaginable disaster to the solar system.

To fight against these strange beings, which can move freely through the universe and possess immense power, humanity has developed countless powerful weapons, such as combat soldiers, magical armored suits, bio-parasite beasts for light warriors, and more.

However, possessing weapons is not the key to victory...

The main theme of interstellar war has pushed human technology to its peak. Yet, under external pressure, humanity’s concept of survival has diverged, ultimately leading to the division of the entire human race.

In the end, some humans remained to defend their homeland, while others formed a vast galactic fleet and began the path of developing a starship civilization...