Female teacher controlled by rope

A dull school clerk at Ataka Gakuen... his true self is Gonda Kotaro, the chairman of the school. Gonda controlled the school behind the scenes, turned it into a privatization, and looked for women he liked who was involved in the school and became prey to bondage torture. Kiyoie Ryoko, a dignified and intelligent new female teacher, becomes a great target for Gonda...