Miiro Nanasaki, who has dreamed of becoming an AV actress since her school days, has taken on the challenge of developing the ultimate erogenous zone, the "porcio," located deep inside the vagina! At first, she is confused by the sensation of her porcio being stimulated for the first time, but gradually she begins to feel as lustful as usual! Eventually, Miiro Nanasaki body is stimulated by a huge cock that is thrust deep into her pussy, and she screams and writhes in agony as she cums over and over again!