Have you heard of the Spence's gland? The Spence's gland is like the G-spot of the breast. This is probably the first work to stimulate the Spence's gland. Yui Hatano, who has appeared in numerous adult videos, said, "This is the first time I've ever felt this! It felt like lightning struck me." She climaxed so much that she even lost control. This is a documentary of Yui Hatano being worked on by a specialist in the Spence's gland! It's rare and guaranteed to be a hot stimulant!