Itou is learning how to be "normal" from her classmate Takahashi, who--despite being a monster in disguise--is a social butterfly. But suddenly, the very teacher Takahashi killed returns as a monster. This new Niehara-sensei aims to eradicate most of humanity and create a bizarre new socie...

Itou is learning how to be "normal" from her classmate Takahashi, who--despite being a monster in disguise--is a social butterfly. But suddenly, the very teacher Takahashi killed returns as a monster. This new Niehara-sensei aims to eradicate most of humanity and create a bizarre new society. Determined to protect everyone's sense of normality, Itou takes a stand...