The prehistoric crisis broke out in 2086 + Human organizations in various places stabilized in 2112 + The story begins in 2146 + Zombies mutate + The real crisis of mankind has just begun...
Heroine: I'm just a "cute" little orphan girl surviving in the apocalypse
Male protagonist: Oh, "cold"
Escape from the apocalypse + strong male and female protagonist + sweet pet
Purpose: Growth and inspiration