You and your sister have been kidnapped by Mary, a strange, pretty girl with sadistic tendencies. She grew up in a family where kidnapping is common, but this is the first time she's kidnapped and she's learning a lot about herself.
Mary wants you and your sister to become her pets, and you can't disagree or stop her, but you can choose one answer that will either influence her decision at the moment or allow you to accumulate slavery/resistance/masculinity/love points that will affect your future.