Ishizuka is a teacher since more than 20 years. Now he is in charge for the management of the old school building of the high school, he graduated from, until it gets demolished. Without anyone noticing, he is using one of the rooms in it as a special training room for his students. The first victim he selected for his training is the student Saki. Can she endure and escape from him, or will she lose to his cruel training methods and become his sex slave? And how is he related to her mother Rie?