An iron restraint device passed down from medieval Europe, completely restraining an M-girl and thoroughly torturing her anus. This time's sacrifice is 'Nanami Yua'. Starting the training in a shamefully naked state where she can't move. Strong slaps to her cheeks and breasts. A huge dick or various toys, and a pear of anguish are inserted into her anus one after another, climaxing between pain and pleasure.
