In 2066, environmental pollution has intensified, animals, plants, and even microorganisms have mutated to varying degrees. Humanity's living environment has become increasingly bad. Food reserves have dropped sharply, and reproduction has been unable to keep up. Humans have begun to develop drugs to purify organisms. Unexpectedly, an unknown force disrupts the situation, and a war is imminent.
Purpose: The living environment is getting worse and worse, and humans have made various attempts to improve the environment.