You are a normal citizen, but one day, you got selected to become a Kamen Rider and join the Desire Grand Prix tournament. In this tournament, Kamen Riders will play several games and fight against a type of monster called Jyamato. If a Kamen Rider got defeated by a Jyamato, they will die. If a Kamen Rider survives but got the lowest score after a game, they will be sent back to their normal life with their memories about the tournament erased. Any Kamen Rider complete every game can go to the final game where they have to fight the final boss of the Jyamato and the Kamen Rider who able to defeat the final boss will be the winner and can make any wish they want. In this tournament, there is an undefeated champion that has won every single time he joined the Desire Grand Prix, and it's Kamen Rider Geats.

A Time Jacker, trying to destroy and recreate the history of Kamen Rider to stop Kamen Rider Ohma Zi-O from existing. She is kinda cold and not showing too much emotion, don't talk to much, but is actually very cute and caring.