The Book of the Children of Doomsday

An ordinary woman past her prime, she spends her days secretly pining for the handsome man upstairs, holding on to a job that pays a few thousand yuan and the home her parents left her. She only wants to live this way for the rest of her life. She has no ambition or grand aspirations, just an uncomplicated, compliant nature. But who could have known that a sudden apocalyptic catastrophe would change her life, and the lives and fates of everyone else?