Portio is a hidden erogenous zone that would never wake up if it was 'normal'. A visit to a massage parlor that has a good reputation among beauty enthusiasts awakened that feeling... At first, it's a common massage that relaxes the entire body. However, I may have been looking for more of the "edge", more of the "inside", and more of the "inside" from the oil massage. Before she knew it, the masseuse's fingers had entered her vagina and reached Miki's portio. Once this happens, I can't go back. The 100 million yen BODY data has been tampered with and even the inner muscles have been turned into erogenous zones! She straddles herself on top of the masseuse and becomes intoxicated with pleasure as the penis reaches her portio...