My name is Yael Lynch. I woke up in a twisted apocalypse as an SSS-rank ghost. The world is full of monsters, but I'm not afraid. I have a system that keeps insisting I'm human. To survive, I make a decision that defies all logic and turn myself in on day one. Change my mindset, and even the apocalypse becomes a blue ocean. Who says ghosts are only killers? They might be the best builders of a new civilization.