Miku Arima's first bondage work! An innocent body tied up and squeezed! A series of training turns Miku into an even more masochistic woman. "It's been three months since I transferred to this school, and although I've managed to fit in with my class, I'm still tormented every day... My classmates don't know if I'm precocious or a pervert, but I have a sexual fetish... I spend my days looking at erotic SM manga and masturbating while tied up. One day, I spotted my homeroom teacher joining an SM club. "I didn't know my teacher was interested in SM..." Miku asks the teacher. "Please train me."