Rosario + Vampire-08"Mathematics + Vampire"Every guy in school notices the math teacher Lolico-sensei and admires her beauty. Tsukune in the meantime has found that he is falling behind the others in math and with the mid-terms coming soon it doesn't look to good for him. Moka and the other girls want to help Tsukune with his math and it works at first. Lolico-sensei takes notice of this and advised him to have extra lessons with her and her alone. When Tsukune goes to see her for the lesson he finds there is even more to her that also meets the eye. When his personality changes after that his friends worry and try to find what is going on.
Note: Based on Chapter 12 of the manga