Yukiko Ishihara, who is a teacher at a school, is a woman who has decided to live as a sex slave to a certain man. As proof of that, she was given a nose ring like a livestock cow. And hiding that nose ring with a mask, she is teaching the children. The nostrils for the nose ring were small at first, but now they have been widened to the point where a padlock can be hung directly on them. The physical modification of Yukiko-san is not just the nose ring. Multiple piercings are attached to her labia, and a steel sex toy weighing nearly 1 kg is hung on those piercings, and she is undergoing training to stretch her labia. Her nipples have also been modified to become enlarged in the same way, and now they are as big as a baby's penis. Although her anus is still under development, she has become able to have sex through her anus, and it seems that it will be expanded with something thicker in the future. Yukiko-san is being modified into a body that would be shocking if an ordinary person saw it. She can no longer have normal love or sex, she has become a miserable woman. Recently, she is said to have received a special gift from her master, a custom-made "lewd" plate, although it is not an engagement ring. Yukiko-san said that she chooses between a padlock, a nose ring, or a plate depending on her mood that day, and that she is doing her own fashion under the mask. In the video, it consists of training from her master, as well as group sex with guests. [Before purchasing] This work is a play submission video shot by an amateur SM enthusiast. There is no AV-like acting or direction, or story. It is a raw and lewd video record.