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.

【月野かすみ麻縄緊縛解禁！！】名門の女学園に赴任して1年。厳格な女教師かすみはある日教室で卑猥な本を読む女生徒を見つけ、注意するのだが…。女教師が見せてしまった心の隙。それが彼女の、マゾ調教の始まりだった。悪魔のような笑みを浮かべながら女生徒はSMの快感を与え続けていく…麻縄緊縛、レズ調教、ペニバンSEX、雌犬調教、玩具絶頂、レズイキ。教師としてのプライド完全崩壊。