In the series "How a Girl's Body Works," the unique concept revolves around scientifically measuring various intimate parts of a girl to uncover her erotic appeal. This time, the adorable and well-proportioned Ayana Natsume appears, using a metal ruler to measure her areolas and nipples. Her nipple measures 6mm, while her pussy measures 5cm vertically from clitoris to the base of the vaginal opening, and 4cm horizontally—introduced as an average, ideal size, with Ayana commenting she's never had any issues with it.
When asked if she masturbates, Ayana firmly answers, "I don't!" After a brief pause, a male crew member explains, "Nipple size is proportional to clitoral size," adding that the clitoris swells when aroused and encouraging her to make it grow larger—prompting her to gradually approach a state similar to male erection. As the metal ruler touches her, erotic moans escape her lips. When asked to say "anal," she responds loudly, "A-na-ru," and is eventually made to utter the dirty phrase "chitsui ondo," intensifying her increasingly erotic reactions.
Lying down on the bed in a wide M-shaped spread, she's told, "Don't move, or it might break," deliberately inducing fear for effect. Close-ups show red lines marking her body, and vaginal sounds are measured to be warmer than body temperature, conveying intense pleasure and a burning sensation. The results are compiled on paper and read aloud in her cute voice directly to the camera, showcasing full humiliation play. A transparent dildo is then inserted to observe the inside of her vagina, revealing her clean, pretty pink pussy.
From a filthy cleanup cunnilingus that ignites her aroused female pussy to sensitivity tests on her nipples, she takes a small cock in her hand and brings it to over 15cm with a blowjob. Vaginal measurements are taken once more—before, in the climax of this erotic examination, a creampie sex scene delivers a massive load of sperm deep inside Ayana's beautiful, heated pussy.