In the world of Sougo Tokiwa and Sento Kiryu, their "companions" are losing their memories one after the other as they're replaced by other people. The Super Time Jacker, Tid , appears before them. He orders his powerful underlings, Another Double and Another Den-O, to pursue a young boy called Shingo. While fighting to protect Shingo, Sougo meets Ataru, a young man who loves Riders, but Ataru says that Kamen Riders aren't real. What is the meaning of those words? While the mystery deepens, the true enemy that Sougo and Sento must defeat appears in the Kuriogatake mountain...
Released: December 22, 2018
Director: Kyouhei Yamaguchi
Writers: Kento Shimoyama
Casts: So Okuno (Sougo Tokiwa / Kamen Rider Zi-O), Atsuhiro Inukai (Sento Kiryu / Kamen Rider Build), Gaku Oshida (Geiz Myoukouin / Kamen Rider Geiz), Eiji Akaso (Ryuga Banjo / Kamen Rider Cross-Z), Keisuke Watanabe (Woz), Shieri Ohata (Tsukuyomi)
Production Companies: Toei Company, Ltd., Ishinomori Productions