Ruka and I have been childhood friends since we were little. Maybe she's already like family to me. So why is this? Lately, I've been overwhelmed by a strange feeling. "I want to mess Ruka up real bad." Is this because of the porn I watched recently? Even I don't know the cause of this feeling. I realized I had said something strange. "How about we try some SM play?" Ruka was also confused but agreed to it. This is how we became the master and slave●. It started as a casual idea, just for fun. I never thought it would end up like this. I've ruined Ruka. Shamelessly shaking her hips, begging to be trained like a masochistic pet.
