Humanity falls... Trapped in the shower by her undead husband, Morgan prays for rescue but quickly realizes she's on her own. She escapes, only to find that the horror has spread and now threatens everything...

A mysterious boy lies naked and unconscious on the street. The story begins when ninth-grader, Ai Oomori, and his third-grader brother, Seigi, find him. This boy has no memory of the past and doesn't even kn...