Among the students who have survived the nocturnal rampages at Yotsuji Academy, Tetsuzo has not been infected with the evil genes and has instead turned into a carrier who has the ability to kill the undead race Nosferatu. He is determined to change this, so he goes into school to see a vampire, Nosferatu Sato-sensei, to turn himself into one of them so he can save his sister from leukaemia. Sato-sensei turns the tables when he realises how good Tetsuzo's blood tastes and decides to drink until he drains him of his last drop of blood.