AMBI-159 — Three Days Alone With My Unrelated Sister! We Had Sex As Much As We Could! Asahi Rin

My mom remarried and I got a new brother who isn't related to me by b**. At first I was worried about whether I could get along with my brother, but now we've become so close that we're more than just brother and sister! I usually do naughty things with my brother when my parents aren't looking, but my parents have to leave the house for three days for a memorial service... I'm really looking forward to spending these three days alone with my brother!