Mesu Kyoushi 4: Kegasareta Kyoudan

Based on the erotic game by Bishop. Takemiya Miyu is a teacher at Seishuu school who teach mathematics with a very tempramental method, make students no one can answer questions from her. After the lesson, Miyu is invited by one of the students of the headmaster to talk about something ... (Source: Translated and Edited from Nekopoi)