Kushina Shizuko, the eldest daughter of the Shizuko Family, first meet Rei Hiro, then got an entry to the FBI, working alongside to infiltrate with the B.O.. She goes into the High School in Kamiyama city, hiding her identity as Akira Senju.
Oreki Houtarou finds Akira suspicious, after some weird things that are happening to her through the school days, her joining the Classic Club means another mystery can be solved.
Will Oreki uncover the girl's identity? Or will Akira surrender first and tell him about her two split lives?
I do not own Hyouka.