A groundbreaking new approach to stimulating women's newly discovered erogenous zone—the Spence's breast glands! In this series featuring exclusive actress Matsuri Kiritani, she draws upon her past experience of achieving nipple orgasm during previous shoots, now taking on breast gland development for the first time. While cheerfully discussing the concept with a childlike smile in the interview, once the procedure begins—using a marshmallow-like I-cup to intensely stimulate her Spence's glands—she is overwhelmed by pleasure, her face twisting in ecstasy. The sensations are so intense they trigger repeated involuntary urination. Further pushed to the edge, she experiences multiple mind-blowing breast orgasms so powerful they cause her to black out, all captured in rare, intense footage of extreme stimulation.