Synopsis: (Terminator + post-apocalyptic survival + mutated creatures + bases + mechs)
The mysterious Clay fungi invaded Blue Star, reproducing and parasitizing at an insane rate, causing the old world to collapse.
Animals and plants that were parasitized became extremely dangerous. To escape the mutated creatures, humanity built temporary shelters and fought back with increasingly powerful firearms and mechs.
But lately, the mutated creatures have been evolving faster, while shortages of soldiers and supplies have deepened the shelters' crisis.
Chen Yu, a C-grade good-for-nothing, accidentally discovered that the metal ball he usually fiddled with was actually a combat robot, and a remarkably powerful one at that.
By chance, he learned the truth about his father's disappearance and exposed the ugly nature of the city's rulers. From then on, he ventured into the wilderness ruled by mutated creatures. He had only one goal: to bring the apocalypse to an end.
