Taisuke Mitamura is shamelessly himself: a wildly open, capital-P Pervert. Any day of the week, he could be seen at school casually flipping through pages of a porn magazine. He justifies his outwardly actions by claiming that ""everybody has these thoughts and desires."" Ever since entering high school, though, Mitamura has witnessed something that he never knew existed: a man with no air of perversion. That guy is his classmate and the school's idol Kei Hayami. Hayami is truly a curious specimen. How can one be a star student, ace of the basketball team, friendly, good looking, AND pure?! Does he have no weaknesses?! Nothing to humble him and remind him that he, too, is a mere mortal?! Becoming more and more curious, Mitamura is even more intrigued after he learns about a peculiar behavior of the pure boy Hayami: he never undresses...! Which naturally begs the question: why not?