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.
A huge 45m zombie is seen approaching Fujiyoshi, the all girls school. Before the school can be destroyed Maiko devises a plan to collect everyone together. Alina proposes an amulet spell, and starts a chant to cast a dubious spell. Maiko and Mutsumi who saw the zombie noticed it is wearing the popular brand "Shisuteinu."
Maiko finds 3 adorable baby zombies, and when she can't bring her self to kill them she abandons them at an abandon house. At the school while following Nakajima and Reiko, Yoko disappears. The students are suspicious of Alina, and rumors spread that she is a "special indistinguishable zombie."
To help Alina become a zombie Maiko goes to get the anti-viral that will help her become human again. On the other hand, Maiko gets into a reminiscent mood thinking about Takumi, the boy she liked who became a zombie. Takumi chases after Maiko and she fights desperately to be free of him. However, he finally catches her, and confesses that he is actually human and not a zombie.
Mutsumi gets the antiviral from Maiko so they can't turn Alina back to human. Alina's in a herd of zombie and they can't seem to get her to a remote location so they can't inject her. It is proposed that Kameoki inject Alina using a bow and arrow.
Rumor flows among student after another one disappears from Fujimi Girls' High School. The existence of zombie that can disguise into human form is undeniable. A zombie trial for Momoka, the most suspected person, is finally held. Tabuchi, Nabeshima, and others are testifying against her while Mutsumi is there to defend here. The time for Momoka to express her feeling has finally come. How is she gonna face this trial?
Hyaku, who is rumored to be a special type of zombie is put in confinement. Mutsumi and Maiko, who are desperately trying to stop the zombies from attacking people, turn to song and dance. Else where, Genki is playing hide and seek with his little brother, however Yuki has gone missing. Around the same time Hyaku disappears from her room of captivity.
Maiko attacked a flock of zombies at school, and fled for her life. Aika, and Midori went with her, and are exhausted from wandering around wherever it is they ended up at. Tabuchi is going to procure food from a house in the woods and invite Mao and Iori along.
Maiko is stunned at the death of Lori and Tabuchi. Mao sinks into deep sorrow at the lose of her sister Lori. Mao witnesses her father, who she hasn't seen since her parents divorce, being turned into a zombie. Everyone being to reminisce and talk about "When I was happiest"....
Maiko, Mutsumi, and Hyaku Hana, have become zombies at last. Tabuchi brings the news that "Boys In humans surviving." Taichi is handsome and has the insight to kill a lot of zombies, and Maiko went to see him.
While wandering aimlessly away from the zombie Maiko happens to pass by the ocean. Mutsumi and Midori join her in sitting by the ocean. They talk about everything that has happened up until now. Maiko suggest that they use their smartphone to send messages to their future selves.
DJ Marlon who survived the zombies to live in the new world is guided by Maiko. He says "If you want to survive follow me, and discard the dream". Mutsumi and Maiko resist and are captured. Hyaku Hana follows him, but is soon deserted.