After a bath, muscular Kiho Izumi and her stepsister Nina, with a plush figure, engage in a candid girl talk, leading to discussions about sex. Niina, who recently got a boyfriend and is still a virgin, becomes the center of Kiho's teachings. Kiho starts by caressing and licking Nina's ample breasts. As their lesson progresses, both stepsisters indulge deeply in each other, exploring and caressing each other's nipples, leading to multiple climaxes. This intimate exploration of stepsisters immerses you in the play of two sexually curious stepsister.