Amou Academy is an enormous institution that takes pride in catering to 200,000 students. It boasts a vast campus that resembles a city in itself. While Sakai Anzu is an average high school student, she is also a member of the Detective agency that operates within the campus. The other member, Yuri, is a mystery of sorts. Though she mostly appears as a little girl, Yuri has the extraordinary ability to transform into a more mature persona capable of solving intricate cases, albeit with a catch. For her powers of deduction to work, Yuri requires sexual energy. Regrettably, it falls upon Anzu to satisfy Yuri's erotic needs.
