In this dark adult teacher-and-student role-play, Karen becomes the target of a depraved teacher. During an exam, he refuses to let her use the restroom until she wets herself. Determined to turn her into his private sex toy, he escalates the training: remote-vibrator orgasms in corridors and stairwells where others may pass, creampie servicing in places meant for study, and degrading words written across her body to mark his ownership. Trained into an obedient human sleeve and sexual receptacle, Karen gradually accepts that she has become his slave.