When you think of Yu Tano, you think of her breasts. And her sensitivity and incredible way of cumming. This time, the project is to see what happens when her breasts are massaged relentlessly for six hours while she is pushed to the limit of her orgasms. From the moment she enters the studio until the sunset. No breaks, non-stop. Her L-cups are massaged, teased, caressed, kneaded, squeezed, and sucked. Just relentlessly, over and over. Even in normal AV shoots, she cums with such intensity, so what happens when her breasts—her primary erogenous zone—are stimulated so intensely for such a long time during sex? I wonder what will happen to her. It might be less like sex and more like an experiment: an experiment to see how long it takes for her to break.