Mayumi Doujima pledges her parents that if she cannot discover a star she spotted a long time ago, she would give up her ambitions of becoming an astronaut on her 14th birthday. Overhearing her plight, the eccentric Manabu Soutouin offers to assist her in her hunt for the star, along with the rest of Yubiwa Academy's enigmatic Attractive Boy Detective Club, whose principles are as follows: "Be pretty, be a boy, and be a detective!" Mayumi, on the other hand, is unusual in that she can see things that ordinary people cannot. Her vision allows her to perceive the smallest details, such as individuals approaching her from afar or hidden traps that would normally go undiscovered. When the search for the missing star begins to deteriorate, the Pretty Boy Detective Club is disbanded.