My Sister Turns into a Zombie King? I'll Take the Mecha and Build a Base with My Backhand

The apocalypse is coming, and others are still killing zombies with kitchen knives. I awakened the mecha warrior summoning system! [It is detected that the host meets the conditions for awakening, and the mecha warrior summoning system is starting...] [Congratulations to the host for receiving a newbie gift package: mecha infantry squad x1, base vehicle x1! 900 Points for the infantry squad and 2,000 points for the tank! Shelter a survivor and earn 0.1 Points every day! Others are trembling, but I lead the mecha squad to push through the apocalypse! My sister was bitten? It doesn't matter, she has awakened the zombie king development system! [The Zombie King cultivation system is activated, and the small world has been opened! She eats crystal cores, can control corpses, and can also farm and raise chickens! A mecha goes with a tank, and the zombie queen goes with a small world! Points are skyrocketing, armaments are expanding, I'm going sideways in this apocalyptic world! From then on, zombies were insulated from him!