The latest installment in the Portio Trance series! Ayumi Shinjo, a slender 148cm beauty with G-cup breasts, takes center stage. The Sexual Science Research Institute kicks off with an interview while applying an electric vibrator, quickly spiraling into abnormal obsession. Subjected to relentless orgasm denial, she's driven rapidly into an extreme state. Then, her uterus—awakened through intense portio stimulation—is meticulously teased toward ultimate ecstasy. With dual vibrators attached to her abdomen, intense pelvic vibrations combined with masturbation trigger continuous, unbelievable convulsions in this shocking performance.