Kenshin had long-since instilled the notion that growing close to him in any fashion sentenced someone to suffering, and so it was hard for him to be selfish in that regard. His life hadn't been his own since the end of the war, but these limits had previously been self-imposed. While being sold off had felt like just punishment for his crimes, he'd found himself wanting of his own accord to protect Sayuri. Over the short time with her, he had grown attached and affectionate swiftly, and his want had gone from protection to simply being with her. He had stifled it, not understanding it at first since it had been so long, but his darker instincts had brought it to light. And now. Now there was no going back, and he was positive, in spite of his fears, that he didn't want to do so regardless. He would keep her safe, and he would be keep a smile on her face.
What she wanted seemed in line with his own desires as Kenshin sucked in a sharp breath, in spite of a lack of need to breathe, when her teeth grazed the skin on his neck. Even such light ministrations had him tightening his hold on her ass as his body responded, cock beginning to grow rigid already.