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 for six hours while she's 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, played with, caressed, kneaded, squeezed, and sucked. Just over and over again. As much as possible. Even in normal AV shoots, she cums with such intensity. So, if she has sex while her primary erogenous zone—her breasts—is stimulated so intensively for such a long time... what on earth will happen to her? It might be more like an experiment than just sex. An experiment to see how long it takes for her to break.