Kamen Rider - Season 21 Episode 1 Medal, Underwear, Mysterious Arm
A mysterious arm reawakens the Greeed from their slumber and decides to use Eiji Hino, a cheerful wanderer, as his means of getting back what he desires as Kamen Rider OOO.
- Genre: Action & Adventure, Sci-Fi & Fantasy, Drama
- Studio: tv asahi, TBS, NET
- Keyword: artificial intelligence (a.i.), cyborg, martial arts, monster, hero, secret organization, villain, biker, superhero, tribe, conspiracy, swordsman, impostor, based on manga, motorcycle, erased memory, super power, masked superhero, supervillain, mysterious death, masked supervillain, death of hero, superhero teamup, mysterious disappearance, henshin heroes, friends to enemies, tokusatsu, evil dad
- Cast: Hidekazu Chinen, Yusuke Hino, Nozomi Miyabe, Kohei Shoji, Takashi Tsukamoto, Machi Chitose
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