The year is 2130. Following the Third World War, extensive contaminated zones called "Blackspots" emerged across Japan. Enormous Walls were erected to isolate these Blackspots. Over time, signs of life began to emerge within these desolate areas. Among the survivors left behind in the Blackspots, deemed "those who were unneeded," individuals with extraordinary abilities surfaced – fire, wind, superhuman strength... They were distinguished by their supernatural powers. However, others, frightened by their abilities, cast them out and branded them as "Needless."