Burdened by the incredible debt his father left behind, Okonogi Masaya is now destitute and alone. However, through a strange collection of events, he finds himself living at the prestigious Vincennes Academy, an all-girls charm school! His purpose is to mingle amongst the Filles De La Vincennes ("Maidens of Vincennes") as the single male "sample" to promote gender integration. How will these young, innocent, and otherwise pure maidens react to his presence?! And just like that, his life at an all-girls school began...