Humanity has entered the distant future of the Galaxy Age.
The ancient practice has not been annihilated due to the development of science and technology. Instead, it has been combined with genetic engineering and neuromechanics to give it new vitality, forming a unique "Star Martial Arts" system.
Through "psionic resonance" technology, humans have achieved deep links between consciousness and giant mechas and starships, but this technology has also attracted unknown threats in deep space.
One of the underlying laws of the universe is that "all things are born into existence and must return to nothingness." A force of nothingness called "the abyss" is like a scavenger in the universe. Wherever it passes, everything turns into nothingness.
The "Emperor of the Abyss" once whispered, claiming that nothingness is the origin of the universe.
A certain ancient human civilization "Celestial Human Race" that has stood in the sea of stars for 100,000 years has fallen to pieces under the erosion of the abyss.
