In search of ultimate pleasure, Miki and Riko visit a bondage show, love hotel...and now the red-light district to conduct research. Watching over them is Miki's elder sister, who leads them to a high-end soapland! After a short course on "mat play" from the beautiful women who work there, Riko suggests that Miki join the action for an "adult massage"! This is how rumors get started, and indeed, Riko returns to college to find that rumors are swirling across campus...but are they true?!