Chapter 22
As the earth reaches its end due to environmental pollution, it wakes their ancient sleeping guardians to exterminate all mankind. A slum-born robot pilot Kay leads a war against these guardians, for the survival of humanity.
Chapter 76
In order to restore the earth's purity, ancient guardians that had long been in hiding rise up to destroy its main pollutants - humanity and civilization. Humans fight for survival against the "blooming flowers" that they had awaken.