The Star Skeleton Gate opens over the Pacific Ocean in the mortal world, and the alien "Star Skeleton Tribe" invades on a large scale. The Star Skeleton Tribe makes a living by devouring the core energy of the planet, and possesses "Star Skeleton Armor" and "Void Spell". Its vanguard troops conquered 30% of the territory of the mortal world in just three months. The alliance of various countries in the mortal world collapsed, and the survivors hid in underground bases or "temporary shelters" opened in the spiritual world. Where should they go in the end...
