The older sister of [Kanako Yuzuki](https://anilist.co/character/17239).

Between August and October, 1952, a series of unusual crimes takes place in Musashino and Mitaka: the attempted murder of 14-year-old Kanako Yuzuki, Kanako's abduction from the strange research "hospital" where she was recovering, then abductions of other girls, followed by their severed limbs in custom-fitted boxes being placed in surrounding towns. News editor Morihiko Toriguchi and crime fiction writer Tatsumi Sekiguchi investigate with the help of onmyōji Akihiko Chūzenji. Meanwhile, Tōkyō police detective Shutaro Kiba searches for Kanako, despite Kanagawa police having jurisdiction; and the lawyer for the estate of Kanako's grandfather hires private investigator Reijiro Enokizu to find Kanako, as well. Their investigation uncovers bizarre truths and dark family secrets along the way.
 
(Source: Anime News Network)

Manga adaptation of the second novel in Kyougoku Natsuhiko's award-winning Kyougokudou Series.
 
Right after the war, Showa era in Japan. Kusumoto Yoriko and Yuzuki Kanako who attend an all girls school plan to take the last train to go to the lake. However, Kanako ends up getting run over by the train. Tokyo Metropolitan Police Department's Detective Kiba who happened to be there when it happened, is asked to watch the confused Yoriko. Kiba goes with the worried Yoriko to the hospital Kanako is taken to, and there Kiba meets a woman who calls herself Kanako's sister; Yuzuki Youko. That happened to be the actress Kiba had been admiring, Minami Kinuko.

Youko Yuzuki