Aya Sasakura, the slender beauty with huge breasts and a mature vibe from S1, appears in the popular series that develops the woman's new erogenous zone, the [Spence Mammary Gland]! The Spence mammary gland is the G-spot of the breast! Developed by a specialist in Spence mammary gland research, her G-cup nipples become rock hard as she screams during breast orgasms! Despite doubting the pleasure of the "Spence mammary gland," the stimulation beyond her imagination triggers a torrent of consecutive climaxes! She squirts uncontrollably and spasms! When the Spence machine further stimulates the mammary glands, she becomes so sensitive that she cums during a titjob! The power of mammary gland development thoroughly develops her until she faints from breast orgasms!
