Ichiro Inuyashiki, an inconspicuous office worker who has entered old age, lives his life alienated by his company and family. But one day, the doctor suddenly announced that he had advanced cancer and that he didn't have much time left, so he began to give up on himself. That night, he was caught in the sudden crash of a UFO, and after being transformed into a mechanical body, he gained power far beyond that of a human. On the other hand, high school student Hiroshi Shishigami, who also suffered an accident, began to use the power he gained as he pleased. Shishigami keeps hurting people who don't agree with him, and Inuyashiki keeps saving people hurt by Shishigami. Is the nature of human beings good or evil? The two people who have gained powerful powers now begin to drive their own thoughts.