MIDE-823 A sister of the same age as my parents' remarriage. She was born just one month early, but she's always on top of me. Mia Nanasawa comes to take me away every day.

The father remarried and started a family with the new mother and her daughter. - She's small and cute and looks like a younger sister, but are we the same age? - But as soon as I heard my zodiac sign, things suddenly changed! - When I found out that I was born first, I suddenly started mounting! - A sadistic older sister who is always looking down is born. - Know my virginity and mount it! - If it's a boring class, I'll just give a hand job to kill time even if there are people around! - She wants to mount herself to the cowgirl position! - A mount girl who looks like a younger sister but has the position of an older sister!