In the popular series "How a Girl's Body Works," which scientifically measures shy girls' bodies, round-faced beauty Azusa Kawai appears! She's 158cm tall and speaks in a cute tone, saying she doesn't really remember her three body measurements. While she immediately answers her cup size as "E-cup," she admits she's never measured her areola length before. First, they check her tongue length—4.5cm, slightly long, with a soft, erotic mouth and tongue as her feature. Her areola measures 1cm, measured after stimulating her nipple to erection, causing Azusa's breathing to grow increasingly rough. Next, they measure her pussy length. While teasing her clit, she lies face down, sticking out her ass to measure anal length, then thoroughly examining the inside of her vagina. Facing a special transparent plastic speculum, she shows hesitation at first, but forcefully inserts it, spreading her vaginal walls open to reveal close-up shots of her beautiful pink folds. With a tense smile, she provocatively asks, "Can you lick this for me?" as she holds out a large, transparent dildo resembling a cock. Looking from the tip, you can clearly see her tongue moving around lewdly. She then guides the toy into her pussy, making her vaginal canal fully visible. They proceed to measure her vaginal temperature before sex. After undergoing these erotic body measurements, Azusa engages in creampie sex. Following creampie, her vaginal temperature rises by one degree! Here, eroticism and science merge into a unique experience.