RBK-105 Maou-sensei, whom I hadn't seen in a long time, was actually into bondage female slave stuff behind the scenes... Natsuki Maron

Film Introduction

Kind and cheerful female teacher, Natsukawa Mao. However, her nighttime face is the bondage slave of Principal Kuroda. Every night, she is bound and gasps emptily. The trigger for this was an incident two years ago. A student, Mizuse, was found to be working part-time without permission and smoking, leading to his expulsion. Mao then happened to meet Mizuse again…