Playing SM with her childhood friend resulted in her awakening her masochistic tendencies and becoming an extremely obedient and lewd little pet. (SONE-951)

Ruka and I are childhood friends, our bond is like family. But lately, I don't know why, I've had this strange urge—to completely subdue Ruka. Maybe it's because I've been watching too many AVs lately; I can't even figure out where this feeling comes from. One day, I blurted out, "Want to try some SM?" Ruka was a little taken aback, but she actually agreed! And just like that, I became the master, and she became my little slave. At first, it was just for fun, a trial run, but who could have imagined things would turn out like this? I've completely corrupted Ruka! She's now a total masochist, swaying her hips and begging me to continue training her—she's incredibly wanton!