MDTM-042 My little sister, whom I've liked since middle school... losing her virginity

It wasn't until I was a junior high school student that I began to notice her. I was capturing her younger sister's growth on camera. Every time I look through the viewfinder my heart beats faster and my girlfriend's younger sister looks like a woman and I see her as a sexual object. On Maki's 18th birthday, I made up my mind and confessed. Two days and one night with no parents at home. We climb the stairs to adulthood...