"Nana, today I'm going to tie up your hands and make you my slave." My childhood friend Nana is cute, innocent, and like a little sister to me. We've always been close, so I've never gotten excited even seeing her panties... But lately, for some reason, I feel this urge to mess with her. I want to make her all wet and have her beg me, saying things like "Please forgive me, master." I might be going crazy... Thinking that, I decided to play around with Nana in a half-serious SM roleplay. Before I knew it, we were lost in intense, hardcore SM sex... [From a Pure Girl to a Domineering M Girl]