Doomsday Survival: I can upgrade entries infinitely

[Survival in the last days + system + partial farming orientation + multiple heroines + don't join if you don't like it] What kind of experience is it like to be the only boy in the class?
Before Wang Xuan had time to experience it, he, all the girls, and the beautiful counselor suddenly appeared in a doomsday world.
In the face of the surging zombies, will he stand up and be a flower protector?Or run away?
At this moment, he awakened the super entry system.
[Wang Xuan, who has no power to bind a chicken] upgrade [Wang Xuan, who kicked and exploded zombies]
【Worthless weeds】Upgrade【Weeds that can cure zombie poison】
……
From then on, Wang Xuan led a group of girls to survive in the last days and uncover the truth about the last days.

Main characters: Wang Xuan, Liu Ruoruo,

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