Rika, whose hobby is reading. Lately, she's particularly fond of the history of medieval torture and has been devouring books on the subject. While reading in the park after school as usual, Rika somehow finds herself entering the story... A dream? Reality? When she wakes up, her hands and feet are bound with heavy iron shackles, and she is imprisoned in a state where she cannot move her body freely. Then, a man dressed in black appears and begins to materialize Rika's fantasies and desires. Even Rika, who initially felt fear and shame, gradually forgets herself in the men's training and devours pleasure.
