A virus swept the world, and most of the people were infected by the virus and transformed into beasts. As the infection lasts longer, people infected with the virus gradually turn into beasts. As the number of beasts increases, it seriously threatens human safety, and a war breaks out. There were too many beasts, and a nuclear bomb was detonated. The people who transformed into beasts evolved again, gained IQ, and established the kingdom of beasts. Humanity can only survive in the plains.
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