ATID-533 — Ten Years Ago, I Was Masturbating In My Room When My Shut-In Sister Saw Me. From That Day On, We Started Having Sex In Secret From Our Parents. Luna Tsukino

Ten years ago, I was masturbating in my room when my sister, a recluse, saw me. She was curious about male genitalia and started touching my dick... I ended up ejaculating. From that day on, we would take advantage of the chance when our parents were not around and greedily pursue each other's bodies.