This JAV features Natsume Hatsuki as the subject of research at the "All-Japan Panty Research Institute," Japan's only public institution dedicated to panty studies.
The research focuses intensely on Hatsuki's large, firm breasts.
Here's a breakdown of the experiments:
1. **Initial Breast Stimulation:** Hatsuki, in her school uniform, is manually stimulated by researchers, leading to masturbation and multiple orgasms.
2. **Breast Observation:** Her breasts are oiled and pressed against a transparent acrylic plate to document their shape and texture.
3. **Dildo and Penis Penetration:** Hatsuki undergoes guided breast stimulation with a dildo, followed by real penis penetration after the researcher achieves full erection through fellatio.
4. **Bubble Bath Experiment:** Hatsuki is given a soapy bath, with researchers continuing to stimulate her breasts throughout.
5. **Group Stimulation:** Surrounded by researchers, Hatsuki experiences intense, consecutive stimulation with toys (rotor, vibrator, dildo), culminating in multiple orgasms.
6. **Fellatio and Multiple Orgasms:** Hatsuki performs fellatio, leading to a series of orgasms as the researchers engage in consecutive breast stimulation and deep penetration.
7. **Final Experiment:** Researchers ejaculate their semen onto Hatsuki's breasts repeatedly, even after she has already reached multiple orgasms.
The JAV emphasizes Hatsuki's large breasts and the researchers' relentless focus on studying and stimulating them.
