The term "portio" refers to the outer part of the vagina at the entrance to the uterus, and it is an especially sensitive area among erogenous zones. In particular, Nozomi Arimura is known in the industry for being far more sensitive than other actresses, reaching ecstasy instantly when her portio is stimulated. So, before the official main shoot, this video attempts to secretly film her portio reactions. What were the results? Her astonishingly sensitive constitution is revealed, and once her portio is stimulated, Nozomi squirts an incredible amount. The sight of her splashing and spraying fluids with tremendous force is breathtaking. Since it's before the main shoot, there's a somewhat private atmosphere, and I want to emphasize that Nozomi shows a more "serious" side to her sex than usual.