I have a sadistic fetish, and I recently got a girlfriend. But she's completely normal and won't put up with my crazy sexual habits... Then, while her parents are out, I drop by her house and meet her younger sister, Yuna. She seduces me, saying she can do things to me that her older sister can't, without telling her, and I'm ecstatic! I'm choked, spanked, creampied, and more...