Now an official new member of the Pretty Boy Detective Club, Meimi Hitomishima reluctantly joins club president Manabu Sotoin in cleaning the art room ceiling. As the work gets underway, the members discover a hidden door in the ceiling. Behind it are thirty-three unusual paintings by an unknown artist. As the Pretty Boy Detective Club investigates the mysterious paintings, its members are astonished to discover that they are connected to a strange event that took place at the academy seven years ago...
