Rika's hobby is reading. Especially recently, I loved the history of medieval torture and read it. When reading in the usual park after school, Rika goes into the story. dream? reality? When I woke up, my limbs were restrained by a heavy iron cangue, and I was confined in a state where I could not move my body freely. A black man appears there and embodies Rika's delusions and desires. Rika, who was initially frightened and shy, gradually forgets herself and devours pleasure in the training of men.
