Hiroaki and the gang roam the city, gathering all sorts of supplies in order to survive in their zombie-infested world. Along the way, they stumble across a wheelchair-bound girl by the name of Shiiko, and she informs them that there’s a way for humanity to flourish once again. Zombie origins, humanity’s salvation, and the AI known as Raven—find out how all these plot points intertwine as the happiest of happy endings creeps over the horizon!