In this popular series on developing a woman's new erogenous zone, the Spence gland, the slender beauty Kana Morisawa appears, becoming more and more sexy! The Spence gland is the G-spot of the breast! Developed by a specialist in Spence gland research, she has her first breast orgasm! She screams as she has a convulsive orgasm with various breast development massages! During Spence sex, where her nipples are teased, she cums so much that she squirts! When her mammary gland is developed carefully with toys, her legs tremble and she urinates a lot! She ascends to heaven with intense piston sex that teases and kneads her nipples! Her breasts and pussy are thoroughly developed until they go crazy!