Our protagonist is Sakiko Kinoshita, a student of twenty years who fell in love at first sight of Professor Chifuyu Takasho and is willing to conquer it all, so much so that continues with impunity to him outright declarations of love only to be promptly rejected. Things start to get complicated when left without money, he decides to do so to get an escort to pay his tuition fees and continue to stay close to the man she loves. When searching for a customer runs into a handsome young man who is proposed for introducing her to the art of seduction. Everything seems to be going well, were it not that Professor Chifuyu bursts in stopping them, Sakiko also discover that the guy she was with none other than Natsuo Takasho the younger brother of his professor. From this moment the problems begin for the two poor brothers forced to have to do with this girl totally unregulated and without the slightest sense of shame.