[Reducing Mosaic]ROYD-020 During the five days my parents were away on a trip, my sister who had just gotten engaged kept inseminating me until she got pregnant. Shinogawa Aina

A younger brother who has been having sex with his older sister for a long time. If we could stay in this relationship forever... However, he finally faces the reality of his sister's marriage that he feared. He used contraception to avoid pregnancy, but no longer. And during the five days spent alone with his sister, they seek each other more intensely than ever before and drown in sex. Her older sister accepts her brother's sperm raw for the first time, saying that even if she gets pregnant, she will be her husband's child, so don't worry. Two hearts and bodies that can't be separated as much as they do.