Wait, I've Already Gone on a Killing Spree, and You Bind Me to a Saintly System?

In a zombie apocalypse, the System is actually an opponent who transmigrated back in time and is disguised as an ally.

If you won't play fair, don't blame me for squeezing every last bit of value out of you.

This is a deranged apocalypse where only people with extreme subconscious instincts can survive.

Want to evolve? Have a child first!

Men can't give birth? Then become a woman!

With extraordinary supernatural relics, you can even dominate an entire region. But are you ready to bear their side effects?