In Kamen Rider- Reiwa The First Generation another Rider from the world that Zi-O brought to an end suddenly stands in the way of Hiden Aruto/Kamen Rider Zero-One! At the moment an Another Rider is born, their existence rewrites the history of the Rider of that era, causing them to lose their powers. Just what is the goal of this new enemy? And why has Another Rider appeared in Zero-One’s world?
After losing his ability to transform into Zero-One due to the presence of Another Zero-One, Hiden Aruto transforms into Kamen Rider 001 using the Metsuboujinrai ForceRiser to face off against it! Why has Aruto gone to use a Metsuboujinrai ForceRiser that only the terrorists Horobi and Jin have been using? Furthermore, the truth behind the day that Zero-One was born is finally revealed! And what will be the outcome of Aruto’s fight against Another Zero-One?