Kasumi Tsukino, a new teacher at a prestigious all-girls school, has been there for a year. One day she catches one of her students reading a lewd book during class and decides to reprimand her... but little does she know that this moment would mark the beginning of her masochistic training. As the student continues to pleasure her with SM techniques like bondage, lesbian training, strap-on sex, humiliation, and orgasm denial, Kasumi's pride as a teacher crumbles completely.
