The City After the End of the World

When civilization collapses and disappears, in a post-virus city, facing endless zombies, how should the survivors maintain a fragile cooperative relationship? Are the revival groups, survivors, and survivors without factions willing to work together for the continuation of humanity? How will three people from different factions intersect under the arrangement of fate, and what will be their final destination? There is no superpower or magic. Everyone who survives can only try to survive in their own way. Sorry, traditional science fiction novels are not very suitable for fans of fantasy (fantasy) literature.