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Shelter Upgrade System

Survival (Including but Not Limited to Ocean, Empty Island, Fog, Wilderness, Apocalypse)

I want to read a book like "It's so fierce, why is there an extra woman on the survival raft". It must be a survival type, and if there is a female protagonist, there must be a female protagonist. Multiple girls are better, single girls are also good. The system is optional.

The End of the World➕multiple Female Protagonists➕decisive Killing

If you want to watch something like "The End of the World, let's take in the four school beauties at the beginning!" Book. Looking for the end of the world➕more female protagonists➕system➕cool writing