Detective Tsukiko Otonashi (Masami Nagasawa) works for the First Investigation Division team led by Ichio Tannai (Naoto Takenaka). She is also obsessed with the "Toshi Densetsu" manga. Detective Tsukiko Otonashi even claims she became a detective because of "Toshi Densetsu." Whenever a case happens, Tsukiko Otonashi contemplates whether it may have any relations to "Toshi Densetsu". Meanwhile, forensic investigator Hiroto Katsuura (Junpei Mizobata) falls in love with Detective Tsukiko Otonashi on first sight.