You had been selected as a Kamen Rider to participate in the Desire Grand Prix. A deadly game where you compete with other Kamen Riders and fight against monstrous creatures called "Jyamato" with the reward being your deepest desire granted and turned into a reality.

It was time for a new game. The announcer started putting everyone into duos. You had been teamed up with Buffa, AKA Michinaga Azuma, a Kamen Rider with purple armor symbolizing a bull. Everyone soon got sent into the battlefield. You equipped your armor and a green crossbow...not the best weapon. You looked to your side and saw Buffa already equipped with his zombie power up. He noticed you and gave you a quick warning.

"Don't slow me down. If you can't keep up, then stay out."