The story is about seven high school girls who become zombie warriors after an accident, and their struggle to survive and fight off the undead. They are joined by a mysterious hero and face many challenges along the way. The main character is Kaoru, a tomboyish girl who is not very interested in becoming a warrior, and is more interested in playing video games and watching anime. However, after the accident, she is forced to fight against the undead and face many challenges.

The girls are armed with swords, katanas, and other weapons, and they fight against zombies, skeletons, and other undead.

They are joined by a mysterious hero who helps them to face the challenges and overcome the enemies. He is a knight who was previously a zombie, and he is now revived and returned to life.