At first, people thought it was just an ordinary flu...
Fever, convulsions, seizures, until the streets were packed with "their own kind," biting indiscriminately.
Humanity, awakened from its dream, is plunged into an exceptionally challenging struggle to survive.
The flutter of a butterfly's wings brings one disaster after another: torrential rain, extreme cold, and scorching heat.
The unfamiliar Earth leaves the survivors utterly hopeless, until one day they unexpectedly discover a hidden paradise.
Post-apocalyptic development. No mutations, no leveling up.
