Sachiko Suzuki is a female high school student. She claims that she is an alien and her mission on Earth is to conceive a child with a human man. Sachicko seduces her class teacher Mr. Fukuda. After their intimate encounter, Mr. Fukuda becomes becomes convinced that Sachiko is not a human. Meanwhile, female student Kobato Hagimoto knows that Mr. Murata has a crush on some male students. Because of this, Mr. Murata is treated as a pig by Kobata until he can't bear the situation anymore.

A magazine publicist investigates an unsolved murder case that occurs on Halloween every year.

In the early 1990s, experiments were carried out secretly in Japan. Two different methods were used in the experiments. One method involved forcing stress upon expecting parents and when the baby was born, provoke the baby into mutations and develop their special abilities. The other method involved birth to babies having abilities of animals and insects. The special abilities were derived from gene manipulation. Subaru, Saya and others were born from those experiments.

Based on the comic book series of the same name by Akio Chiba.

We usually spend our time at school without thinking about it. In the closed space of school, students create a world of fear and horror. From “Magical i-Land”, one of the largest community sites in Japan! Following the first and second installments, which were extremely popular and well-received, the third installment has finally been released. This time, it is an authentic school horror story!