KAMEN RIDER OOO: THE BIRTH OF BIRTH X PROLOGUE
As the ancient king OOO continues his onslaught on humanity, Kougami gathers his former employees to create a resistance... and introduce a new weapon in the fight!
Original Title: ネット版 仮面ライダーオーズ バースX誕生・序章
Release Date: 13/03/2022
Duration: 5 min.