School girl Inui Maiko miraculously survives in a zombie infested world. Sailor school girl Mutsumi protect a place that was suddenly attacked by zombies. It helps that she wears a high school girl sailor suit. At Fujiyoishi, an all girls high school, girls lives a surprisingly ordinary life. Maiko guides music teacher Terakawa to the school. Teacher Nabashima Daisuke accidentally unleashes a swarm of zombies.