A shoulder pain clinic located in Tokyo had gained mysterious popularity through advertisements in women's magazines and websites, as well as word-of-mouth on its underground site. The reason was a special service offered under the guise of treatment—specifically targeting women with big tits and extra large breasts suffering from shoulder stiffness. Under the pretense of therapy, the staff would carefully massage and loosen their bodies, focusing intensely on kneading their breasts, eventually touching even their most intimate areas. Rumors spread that married women seeking sexual satisfaction were irresistibly drawn to this temptation, visiting one after another.