“If a zombie and vampire went all out, which one would win?” Those fateful words began a serious sisterly fight between zombie little sister Ayumi and vampire older sister Erika. The entire city has been recreated using the environment simulator created by the main character and a virtual horror movie begins with the fleeing residents as the targets! Characters: Ayumi: Zombie girl. Erika: Vampire girl. Satori: High school boy with a zombie little sister and vampire older sister. Maxwell: Support program developed by Satori.