In the End of the World, There Is an Island in My Backyard

This is not a story about a hero saving the world. This is a story about an ordinary programmer who finds a place to survive for himself and those around him in the apocalypse. There are fields to farm, meat to eat, brothers to live with, and a home to return to. If you also yearn for such a "doomsday paradise", then you are welcome to come to the backyard of the old house and take a look at this island.