One day on a holiday, my sister spends her time without pants or a bra. When you look closely, you can see her pussy peeking out... My virgin brother, who can't stop getting an erection from seeing her pussy through the gaps. My sister's pussy, which emits a faint, alluring scent... Is this an accident? Or is it inevitable!? My brother, misunderstanding that he was tempted by my sister's visible erotic pussy, can't help but immediately insert his virgin penis! My sister's defenseless, pantless pussy swallows my brother's virgin penis and he thrusts wildly, losing control. How many times can he cum inside before our parents come back!?