ツンえむ！ ～ぎゅっと縛って指導して～ THE ANIMATION

Based on the erotic game by Ammolite. Koike Saki is a schoolgirl, while Hamaoka Takeshi is a teacher, as well as coach of her at the school swim club. Their relationship at school is only limited to teachers and students. However, after finishing school activities, their relationship is a pair of l...