As a High School Student in Sin City, I Was Forced to Save the World

What is the end? Is it zombies? Humans are eking out an existence in the wasteland, or is it an alien invasion and humans are rising up to resist? No, because the most terrifying thing in this world is human beings themselves. That day, the end came, but few people knew it, because there was no zombie crisis that day, let alone a blood-red sun, but in the darkness, evil had spread. An employee who was innocently laid off turned into a blood-licking demon and slaughtered his entire family. An honest man who lost his care turned into an Asura and walked around the world. Even the mother cat who watched the naughty child kill her own child turned into a savage beast. That day, I owned the mythical mecha, which was the only way to fight against evil. No one knows where sin comes from, but I will never forgive any sin. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.