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仮面ライダーガッチャードVS仮面ライダーレジェンド
Reiwa Rider? 100 Years Too Early!
Houtaro is suddenly transported to a parallel world. Awaiting him is a young man named Houou Kaguya Quartz who summoned him using that world's technology, the Aurora Curtain System. His favorite phrase is "Gorgeous" and he protects the world from the clutches of the evil organization called "Hundred". What's more, the person following Kaguya is a butler named Butler, who looks exactly like Houtaro's friend Ryo Kajiki!
Hotaro suddenly finds himself transported to another world, where he encounters a man who seemingly has power over all Kamen Riders!
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