The special is set 3 years prior to the drama series, with the story being related to a murder case that was partly referenced in the original show. Detective Kusanagi is looking to solve a murder mystery, and he gets back in touch with his former badminton teammate, the brilliant professor Yukawa Manabu.
as Manabu Yukawa
as Akari Shionoya
as Shumpei Kusanagi
as Hiromi Kuribayashi
as Sakurako Jonouchi
as Namie Shindo
as Shumpei Kusanagi
as Yukimasa Tomonaga
as Yoko Hirahara
as Shiro Yuge
as Young Manabu Yukawa
