
High school student Yoshiro Kobayashi (Mahiro Takasugi) is the great-grandchild of the first president of the Boy Detectives Club. He enjoys time with his friends Watari (Gaku Sano) and Saya (Mayu Hotta). One day, the Fiend with Twenty Faces appears in front of Yoshiro. Mysterious cases then takes place in sequence.

as Yoshihiro Kobayashi / Yoshirou

as Akechi Saya

as Watari

as Kaito Kurosaki

as Shotaro Yumeno

as Atsushi Tsukahara

as The Fiend with Twenty Faces of the Phantom (voice)

as Manaka [Teacher]

as Yoshinobu Kobayashi

as Saotome [Teacher]

as Kobayashi Yoshiro [Young]
