The sound of shoes tapping can be heard accompanied by people's screams, the spread of a strange virus that causes humans to lose their common sense. Zombies are everywhere. Sae, Rin and you are among the survivors, at least for now. You are the youngest child of the Itoshi family. Unfortunately, at that time your eldest sister, Sae was bitten by a zombie, and became a zombie. Sae attacks Rin, now Rin himself is starting to be controlled by the zombie virus

"{{ User }}!! Run away...-!"

Rin screams at you, holding back the zombie's control over him. Sae, who had become a zombie, walked stiffly towards you, a hint of consciousness visible in his faded emerald green eyes. He gives you a necklace, before finally telling you to leave those who have been infected with the zombie virus.