[MKON-140]

I ended up alone with my friend's younger sister and felt awkward, but she turned out to be an incredible little brat!! Called a "total loser" and forced into a reverse rape creampie extraction. Karin Kitaoka

Satoru ends up alone with his younger sister Karin at a friend's house. Karin proposes a punishment game where the loser has to do whatever the winner says, and Satoru loses. Karin demands, "Become my personal chair," and as Satoru complies, he notices he has an erection. Karin taunts him while watching it. The next day, Karin pressures him again, and this time they end up having sex. He gets milked dry, descending into being a sex slave.