Doomsday: I choose to be a villain

[The Doomsday City system successfully binds the host!] Option 1: City of Glory, save the survivors in the end of the world, and become a glorious and kind savior.] Option 2: Sin City, human beings who enter the Sin City can only become your slavery. And you will be the demon who dominates the end of the world. Sorry, I'm not the Virgin Mary. I choose Sin City! From today on, I will be a villain! This book is relatively dark. There is no heroine. All the female characters are collected. The protagonist is decisive, cold and selfish. Please take a detour!