My niece decided to move to Tokyo from the countryside to go to university, and until her new home is decided, she will live with me, her uncle. When I went to the meeting place, there stood 'Kasumi', who had grown into a proper adult. When I lived with her, I was called to the bathroom, shown masturbation... I was bewildered by her too unrestrained behavior and too defenseless appearance. One day, Kasumi said, "Uncle, you're always looking at my breasts, aren't you?" and tempted me with her fair-skinned big breasts... I couldn't help but get an erection at her straightforward provocative act with the swelling of her breasts that I had been curious about since I last saw her... I easily succumbed to Kasumi's temptation... Exhibitionist masturbation, nipple licking handjob, pounding/choking riding position, blindfolded bondage masochistic torture... a total of 5 ejaculations. A fair-skinned, black-haired beauty with big breasts... a lewd cohabitation life with my S-type niece 'Kasumi Tsukino'.