Synopsis
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
Director
Director
Cast
Dr. Akira Date / Kamen Rider Birth
Shintaro Gotou / Kamen Rider Proto Birth
Erika Satonaka
Kousei Kogami
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