Brothers and sisters who grew up receiving enough love from their parents were always together at any time. Among them, the older brother underwent a remarkable transformation in the process of approaching an adult man, and the younger sister also grew into a large and rounded buttocks that did not look like a slender system. Along with the changes in each other's bodies, there was also a change in mind, and the brother's affection for his sister began to lean toward a rounded butt. The younger sister also sensitively sensed the changes in her older brother, and began to feel a different kind of affection from brother-sister love towards him. Without knowing that my butt is being targeted... A total of 3 volumes of controversial work that depicts the abnormal affection of a brother who loves buttocks and a sister who accepts it.
