When I was playing BDSM with my childhood friend… she woke up one morning to find herself a masochist, transformed into a sensitive masochistic pet. (SONE-270)

"Nana, today I'm going to tie your hands, and you'll play my slave." My childhood friend "Nana" is cute and innocent, like a little sister. We've been friends for a long time, so I've never felt excited when I see Nana's panties, but recently, for some reason, I have an urge to tease Nana. I want to make "Nana's" body tense up and say, "Please forgive me, Master." I might be going crazy... With that in mind, I half-jokingly pretend to be an SM, and without realizing it, I've started to get crazy about fully mature extreme SM sex... [Innocent Girl Transforms into Obedient Girl] *Content may vary depending on distribution method. Special Feature Click here to view "S-1 Number One Style," which is full of important information such as the latest works and promotional products!