So Okuno , Atsuhiro Inukai , Gaku Oshida , Eiji Akaso , Shieri Ohata , Kaho Takada , Keisuke Watanabe , Kouhei Takeda , Kensei Mikami , Nayuta Fukuzaki
In the world of Sougo Tokiwa and Sento Kiryu, their "companions" are losing their memories one after the other as they're replaced by different human beings. The Super Time Jacker, Tid , appears earlier than them. He orders his effective underlings, Another Double and Another Den-O, to pursue a young boy referred to as Shingo. While combating to shield Shingo, Sougo meets Ataru, a younger guy who loves Riders, but Ataru says that Kamen Riders aren't real. What is the meaning of those phrases? While the thriller deepens, the actual enemy that Sougo and Sento need to defeat appears inside the Kuriogatake mountain...