ATID-533 10 years ago, when I was masturbating in my room, my reclusive older sister was watching me. - From that day on, we started having sex hidden from our parents. - Tsukino Luna

10 years ago, when I was masturbating in my room, my reclusive older sister saw me. - My sister, who was curious about male genitalia, started touching my cock... and I ejaculated. - From that day on, we looked for opportunities when our parents weren't around and devoured each other's bodies.