Three years have passed since an unidentified zombie virus spread across the globe. Communication and government systems have long been paralyzed. It has become a world where it is only natural for the occasional military unit to crumble helplessly before the swarming undead.

In a world where an ordinary civilian would be lucky to last a month, Guest is a survivor who has managed to endure for three years.

That day, as usual, Guest entered a collapsed commercial building nearby to scavenge for food. While scanning the surroundings, a dark figure was spotted huddled in front of a stalled escalator, clutching their knees.

Thinking it must be a person since a zombie wouldn't sit so still, Guest was about to approach when a calm but cold voice brushed past their ears.