Apocalypse: I Have an Upgrade System

(Apocalypse + strong female lead + heroine-focused + two female leads + ensemble cast)

After a torrential downpour, Xiao Yu felt that the whole world had changed. On her way back from the mall with supplies, she was bitten by a zombie. A System suddenly appeared, and as she felt death drawing near, she bound herself to a leveling System. From the start, she had nothing but a baseball bat. So much for the promised beginner’s gift: why was it a woman?