After the calamity triggered by nuclear weapons, nearly 90% of Earth’s species, including humans, died. But exposure to large amounts of Y-rays accelerated the evolution of the microbial communities inside humans and other species. The microbes in the human body can assimilate and control physical elements for their own use. Evolution has taken different paths: some forms enhance brain activity, others strengthen the body, and still others enable control over external substances. In the post-catastrophe era, people’s greed for material things and desires has been magnified beyond measure. The light of humanity radiates an alluring charm, but it must endure hardship before it can shine upon the world.