The shocking battle of "Geats VS Revice VS Ryuki" begins now. The first part of the "last story" of Kamen Rider Revice, the collaboration of Geats×Revice×Ryuki. What awaits Ukiyo Hidetoshi who is invited to participate in Desire Grand Prix is the new game "Desire Royale" that was changed and made by someone. The strategy of the mysterious game manager who is secretly active, the great battle between Kamen Riders! The mysterious Kamen Rider appears, and the unprecedented melee game begins...! Who will be the final winner in the fierce battle? And what wish does the winner want to fulfill?