A must-have realistic survival novel in the book shortage, focusing on the precious friendship between girls in desperate situations. Some of the protagonists are good at observing people and controlling the overall situation, some are strong enough to face dangers, some are proficient in pharmacology to maintain the health of the whole team, and there are also low-level girls who are timid and cowardly at the beginning and have been suppressed for a long time. After the end of the world, the old family ties continue to turn into shackles, and a group of girls are exploited by their families one after another. The climax of the story is full of excitement. All members unite and decisively cut off their original families who are dragging them down. Even if they are discredited or reported by their relatives, the teammates in the team will stand firmly by each other's side. Everyone repaired the fortifications together, distributed supplies carefully, and relied on down-to-earth efforts to stabilize the foundation of survival bit by bit.