This special takes place during the events of Kamen Rider Saber episode 8. As Daishinji analyzes the King of Arthur Wonder Ride Book, he and Ogami reflect on the incident 15 years ago.
Hiroaki Oka
Tetsuo Daishinji / Kamen Rider Slash
Yuki Ikushima
Ryo Ogami / Kamen Rider Buster
Koki Uchiyama
Desast (voice)
Eiji Togashi
Ren Akamichi / Kamen Rider Kenzan
Ryou Aoki
Kento Fukamiya / Kamen Rider Espada
Rina Chinen
Sophia
Hiroyuki Hirayama
Kamen Rider Calibur (voice)
Takaya Yamaguchi
Rintaro Shinda / Kamen Rider Blades
Asuka Kawazu
Mei Sudo
Kōji Saikawa
Zoous
Masashi Mikami
Kenshin Nagamine