HUNTA-061 From a closet she couldn't escape from, the sister accidentally saw her brother masturbating—something she absolutely shouldn't have seen—and secretly got aroused. In the room of the brother she thought was serious and pure, there were tons of m

I thought my younger brother was timid, but he turned out to be a masturbation maniac multiple times a day! I discovered erotic books and AVs in his room and was shocked. Just as I was trying to figure out how to escape from the closet where I hid, my brother started jerking off! What's more, no matter how many times he came, he stayed fully erect! Watching my brother's unyielding dick made my sister start masturbating...