The life of the distorted love of my brother and sister in adolescence. A crack in the tsuruzuru of his birth is committed by Roricon's brother. The hole that was widely used by his older brother has already been expanded, and even the top-thick incision stick is slapped with no difficulty. He was absolutely obedient to his older brother who dedicated his virginity. A sister who accepts it happily even if a large amount of sperm is poured into the uterus.