This work completely restrains a masochistic woman using iron restraints passed down from medieval Europe, and thoroughly tortures only her anus. This time's sacrifice is Yua Nanami. She starts training her in an embarrassing naked state where she can't move. A strong slap to her cheeks and boobs. When a big dick, various toys, and painful pears are inserted into her anus one after another, she cums between pain and pleasure.