Cocoon of Time Grocery Store Will Help You Solve the Mystery of the Apocalypse

[In 2035, the "Dark Sun Catastrophe" broke out, and the mysterious black fog infection started the apocalypse. The world fell into silence, ecological collapse, zombies and mutated creatures were rampant, and human society degenerated into a doomsday wasteland where the jungle cannibalize the strong. The protagonist Wang Tingyu accidentally became the owner of the "Cocoon of Time" grocery store. What choice should everyone make in the transaction of the apocalypse? How does Wang Tingyu solve the mystery of the apocalypse]