The End of the World: Forced Contract with the School Beauty in Black Stockings at the Beginning

[System + Contract + Invincibility + Not the Holy Mother] The end of the world? Zombies? Mutated beast? At the moment the system woke up, Li Ruyi said there was no need to panic. Beauty! Resource! Followers! ! Let's see how the protagonist Li Ruyi transforms from a person who only wants to protect the people around him to a doomsday giant, supporting a safe zone for the human world.