FPRE-217 我独自生活，我妹妹是个性欲旺盛的妹妹，总爱待在我房间里，但我终于发现了能激发她性欲的乳头开关！她就此蜕变为一个淫荡的荡妇，把我榨干了最后一滴……

I’m a college student living alone near my parents’ house, and I have a sister named Himari who is also a college student. Perhaps because of her flashy looks, my parents don’t allow me to live alone, so I’m forced to live with them. To relieve stress, she has a routine of coming over to my room and lazing around playing her favorite games. Today, Himari was playing games until late again, so I urged her to go home, but…