Innocent amateur female college students are picked up in Shinjuku and Shibuya. What they experience is ostensibly a "female brothel," but in reality it's a trap of pleasure that includes the forbidden act of actual sex. With the careful massages from the handsome therapists, their guard is lowered and they gradually reveal their feminine sides. This is the story of four couples whose bodies cannot lie to the caresses of a professional they are experiencing for the first time, and who become addicted to actual sex that is supposed to be forbidden. The confusion that only amateurs experience and the moment when instinct overcomes reason are depicted with extreme realism.