Butterfly and Cat

One day in the future, an accidental gamma ray burst destroys almost the Earth's entire atmosphere, and everything changes in the past. Under a disaster, being alive becomes the only theme of existence. This article is mainly realistic, there is no YY, and it may not be enjoyable to read. Without a specific protagonist, everyone alive can die! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.