SONE-681 Too Innocent to Resist and at the Mercy of an Older Man!? I became infatuated with her younger sister and kept seeing her in secret. Ruka Itoi

I was asked to help tutor my girlfriend’s younger sister, Ruka-chan. Even though she was a schoolgirl, she was still very much a child—innocent and cute. She also seemed to know very little about relationships, and would sometimes be careless about her appearance. On top of that, her figure was more developed than you’d expect for her age. Even though I knew she was my girlfriend’s sister, I found myself looking at her as a woman. Before I realized it, I had kissed her soft, youthful lips. While Ruka-chan was still startled, I was completely absorbed in the moment. It was probably her first kiss. Perhaps because she was so inexperienced, she didn’t seem to fully understand what was happening. She showed very little sign of resistance. She was that innocent… The more I realized how wrong my actions were, the more intensely my body reacted.