The Suzunari detective club, comprised of three high school students - Suzaku Tachibana, Kouhei Hiba, and Soutaro Tsubaki - and their feline companion, Boo-chan, is an all-male group due to Boo-chan's stringent female membership criteria. However, Suzaku's intuition found their perfect female member in the form of Aoi Kaidou. Although Aoi appeared serious and unsmiling, she passed Boo-chan's tests and joined the team. Together, they solve mysteries on their school campus. Volume five features "Itsumademo Issho ni" and volume nine presents "Anata wo Shiritakute" as additional stories.