Nobody knows where they came from. They parasitize in human beings, take control of them and change their bodies into hideous monsters (Necro-borg). The Necro-borg fight each other until the other dies. Where did they come from? To what end? Yuji and Kaoru, whom both have dark secrets within themselves, get caught up in the horrific battles of Necro-borg. What will their fate be?

High school student Mizushima receives Valentines Day chocolates from the new student, Monami. Little did she know that the chocolates contained traces of Monami's vampire blood. He gets infected from eating them and Monami confesses that she wants to live with him forever as vampires. Meanwhile, Mizushima decides that he wants to fully become a vampire with Monami's help. Keiko, Mizushima's girl friend, sees the two on the school rooftop kissing and in a state of hysteria, attempts to throw Monami off the roof but falls off herself instead. Keiko dies but her father, Kenji Furano, the mad scientist, resurrects her as Franken girl. Thus begins a deadly combat between Franken Keiko and Vampire Monami in the name of love.

Stilling reeling from the events of a zombie apocalypse, a young woman, along with a group of allies, makes her way across a dystopian Japan in search of her mother, the Zombie Queen.