Mathematics and Vampire

Every guy in school notices the math teacher Lilico-sensei and admires her beauty. Unfortunately, Tsukune is falling behind the others in math and it is summer school for him if he fails the mid-terms. Yukari and Moka try to help Tsukune with his math in their own way only to find that their efforts have drawn the attention of Lilico-sensei who insists upon extra lessons with her and her alone. Unfortunately, Tsukune's newfound proficiency in math from these lessons comes at the cost of his personality; a bit of investigating that reveals there is more to Lilico-sensei than meets the eye and a battle with the inner Moka later, Tsukune is back to normal. It turns out that all of that artificial knowledge was not necessary for Tsukune to pass the mid-term.