Shizuka works as a teacher at the same school as her husband. With the allure of a mature woman, Shizuka even attracts the interest of students as a woman. Among them, Aoi, whose father is a powerful figure in the academy, schemes to make Shizuka his own. At that time, Sakawa, disguised as a janitor, catches evidence of Shizuka's husband's corruption. Thus, for her husband's sake, Shizuka is bound with dirty hemp rope and subjected to humiliating training. The pain gradually implants female pleasure into her mature body…
