While testing the Birth X Driver, Shintaro Gotou is shunted into a parallel world filled with many familiar faces in unfamiliar places. Can he master the secrets of the Birth X Driver and return home?
君嶋麻耶
as Shintaro Goto / Kamen Rider Birth X
岩永洋昭
as Akira Date
有末麻祐子
as Erika Satonaka
宇梶剛士
as Kousei Kougami
高田里穂
as Hina Izumi / Kamen Rider OOO
渡部秀
as Eiji Hino
三浦涼介
as Dr. Ankh
山田悠介
as Uva
Taito Hashimoto
as Kazari
矢作穂香
as Mezool
松本博之
as Gamel
甲斐まり恵
as Chiyoko Shiraishi / Kamen Rider Birth
