Z-Day +1...In times of crisis, even the most mundane activities become a monumental task. While on their way to the rendezvous, Rei and Komuro find that there's more to fear in this new world besides the walking dead.

The population grows desperate and chaos runs wild in the streets. Crossing any bridge presents a world of problems for Komuro and Rei, while dissension among the ranks splits the bus group in two.

After narrowly escaping with their lives, Komuro and Saeko must make their way alone and rendezvous with the others. Saeko's true nature is revealed, and it begs the question: Is her beauty only skin deep?

The group reunites at Takagi's house, an impenetrable fortress run by her parents and their army of workers. After surviving this long on their own, being absorbed into a larger group becomes a huge concern.