"I want to do it with you, onii-chan."
My little sister Yuki, who was supposed to be sleeping below me, suddenly approached me while I was covertly masturbating in the middle of the night. I managed to hide the fact that I was masturbating, but Yuki started to ask if she could sleep with me... I was turned on by the softness of my little sister's body as she innocently clung to me and I couldn't help but react... "What were you really doing?" With those words from Yuki, the line between brother and sister was easily crossed...