The little sister and her brother are playing a game until he suggests something she never expected - sex! She is outraged as it's not a usual behavior of a brother toward his sister. But he insists and, after a few minutes, she unexpectedly agrees to go through with it. It's the first time she's ever had sex and her brother takes it slow, making sure not to hurt her. In the end, the little sister loses her virginity in the loving embrace of her own brother.