This is a slave retraining center where bad slaves are sent by mistresses. In the morning the female instructor takes the slaves from their cells and begins their retraining. The instructor makes the slaves explain the reasons why they were sent to this center, names them No. 1, No. 2, and No. 3, and has them wear disposable diapers. The instructor injects water into the slaves' anal passages, then throws a bone and has them compete to pick it up. The instructor praises the slaves who pick up the bone and pats them on the head, but punishes those who fail with a whipping. Every time the instructor throws a bone, she injects more water into the slaves' anal passages, and she laughs at the suffering slaves as she makes them continue picking up the bones. The slaves must endure rigorous training to become excellent slaves. For the female instructor, this center is the perfect workplace to indulge in her sadistic sexual tendencies.