DANDYA-003 Big-breasted girls multiply in a chain of sex. When I went home, my little nieces suddenly grew into busty girls.

When he returns home for the first time in seven years, his niece, Tsubomi, welcomes him. Tsubomi embraces him and gets shirtless, just as they always did. His groin begins to heat up, and he starts fondling her newly grown breasts. Tsubomi's repeated sensitive reactions drive him to lose his mind, leading to forbidden sex. Feeling good, Tsubomi brings her niece, who has even bigger breasts than her, over to his uncle's house, for his boob-loving uncle. The busty niece, who arrives, has sex with him, spurring him on, climaxing over and over again. Just when he thought it was over, another niece with even bigger breasts arrives... They have sex in all sorts of places, including the garage, the bathroom, and the room, and the uncle and niece are constantly immersed in sex, using swimsuits and toys.