Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease! (仮面ライダービルド 誕生！クマテレビ！！VS仮面ライダーグリス Kamen Raidā Birudo: Tanjō! Kuma Terebi! ! VS Kamen Raidā Gurisu)

This special takes place between episodes 18 and 19. It reveals the origin of the Hokuto Three Crows' dog tags.

SD
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HP
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