Beautiful Skin Teacher: Big Tits Vibrator Torture (2005)

A high school student (Matsuura Yuya) lives alone with a beautiful teacher (Yato Aki) who wears glasses. When a fellow teacher, Nakamitsu, finds out about this, he sets a trap for the two of them, but a tsundere teacher (Hanazawa Lemon) saves the day, and Aki gives her body to Matsuura who puts himself on the line. A fine coming-of-age comedy.