The idea is rather simple. A girl brings up hypnosis to her boyfriend and he decides it would be cool to hypnotize her. He is successful. He basically makes her his sex slave. He has her doing things he'd never even dared ask her to do before. She has sex with him, his friends, other women. He gets her calling him master, calling herself slave (or some other such name). She does whatever he desires. He'd never even had sex with her before! The week goes perfectly for him. Since he has ordered her to behave normally in classes, nobody suspects a thing. Still, when he orders her to handcuff herself to the bed one day, she says, "Sorry, I have a test in a couple days and I need to study. We'll have to continue this game some other time." His eyes widen in shock. She continues, "I've been having a lot of fun, though. I wish you'd become this open sooner."