[AMBI-145] Younger Step-sis That Isn't Related By B***d, It's Just The 2 Of Us For 3 Days! Now Is Our Chance For Non-stop Sex! Ichika Kasagi (Censored)

My mom remarried and I had an older brother who had no blood connection. At the beginning of my remarriage, I was worried if I could get along with my brother, but I became too close and became more than a brother and sister. I used to steal my parents' eyes and do naughty things with my older brother, but this time, my parents will be away from home for three days due to the law. I'm really looking forward to 3 days with my brother alone!