Ep. 8: Tsukune struggles with math until vampire teacher Ririko Kagome intervenes with dangerous tutoring methods.

8

Tsukune risks summer school due to poor math grades, prompting Moka to share her study notes. Math teacher Ririko Kagome interrupts, insisting on providing extra lessons instead. Her instruction grants Tsukune unusual proficiency but erodes his personality. Moka discovers Ririko is a lamia using her serpent form to seduce Tsukune while forcing formulas into his mind. A physical altercation ensues, causing Moka’s notes to scatter and restore Tsukune’s sanity. After Tsukune removes Moka’s rosary, her inner self swiftly defeats Ririko. The following day, Tsukune passes his midterm exams, aided by the recovered notes. Yukari achieves top marks, Mizore barely passes, and Kurumu fails the test completely.