While my friend Ai is napping beside me, I can't help but feel mischievous. Usually she gets mad if I touch her, but today feels different somehow. Drawn by her warmth, our physical contact gradually intensifies, and I notice her getting wetter. Seeing her like this makes me so aroused that I can't control my erection anymore, and I end up crossing the line. Knowing we've had sex only heightens our excitement, and I lose control, cumming inside her. From this day forward, we become fuck buddies.