Hen Zemi Nanako Matsutaka is a freshman in college, who like many normal girls has enrolled in a course just so she can get closer to the guy she likes. Unfortunately, she’s now taking the Pervert Physiology Course and her classmates are far from ordinary. With Michikawa lurking under stairwells to take photos of girls’ panties and Mizukoshi cultivating flies in her ears, Nanako’s wide-eyed innocence makes her the odd one out in a bunch of depraved perverts. Will Nanako be able to pass the class when she can’t even justify the worthiness of a report on farting in the bath, and will she ever catch the eye of the cunning Konogi?