Mayumi Doujima, a second-year student at Yubiwa Private Academy, is a girl on the hunt for a star that can only be seen once in every ten years. But it turns out that the "Pretty Boy Detective Club"--a mysterious, non-profit organization that is rumored to secretly solve trouble on campus--has decided to help Mayumi search for the star. These five vivacious pretty boys send her reeling, and set the stage for days of risky adventure!