After entering high school, Suzaku Tachibana, Kohei Hiba, and Sotaro Tsubaki attend the club fair, but leave without finding anything that piques their interest. On their way home, they encounter a young girl being pursued - and thus begins Chapter 17 “The Birth of the Detective Club”! In Chapter 19 “The anonymous letter”, Aoi Kaido receives a mysterious love letter... could it be her chance at romance? In addition to the Suzunari chapters is the original story “Together Forever”. Suzaku and Aoi... just what are their feelings towards each other?