A new infection has spread around the planet, that turns people into undead. The story begins a few minutes before the first recorded case, and shows the struggle of six youths to survive this new world.

Naoto Watari has had his share of struggles: His parents died two years ago, and now he and his sister live at his aunts house. There, his desire to protect his sister earned him notoriety as “the guy with the sister complex,”—which never mattered to h