Did the world return to six months ago? This is a chance? Or repetition of despair? A catastrophe, a zombie virus that hit the Earth. Three years to survive a devastating and desperate life through dozens of death crises on a ruined planet. Eventually, I couldn’t stand it anymore, and I was hit by a zombie horde and ended up. And … when I opened my eyes again … I was back in the past just six months before the zombie virus came into the world! In the next six months, this peaceful world will perish. And only me knows it.