
Leading an expedition in Germany, Kougami unseals the resting place of one of the alchemists that created the Core Medals in an effort to retrieve a set of lost Medals. However, upon the seal being undone, millions of Cell Medals erupt into a tower while creating a magical barrier that causes parts of Japan to flip over. As the alchemist reveals her plans to become a new OOO, Eiji and his friends are thrown into the past and must find their way back home and stop the alchemist before she destroys the world!
Genres:

Shu Watanabe as Eiji Hino / Kamen Rider OOO

Ryosuke Miura as Shingo Izumi / Ankh

Riho Takada as Hina Izumi

Hiroaki Iwanaga as Akira Date / Kamen Rider Birth

Asaya Kimijima as Shintarou Gotou

Mayuko Arisue as Erika Satonaka

Takashi Ukaji as Kousei Kougami

Marie Kai as Chiyoko Shiraishi

Yū Kamio as Kiyoto Maki

Yuusuke Yamada as Uva

Taito Hashimoto as Kazari

Honoka Yahagi as Mezool

Hiroyuki Matsumoto as Gamel

Ken Matsudaira as Yoshimune Tokugawa

Taiki Negishi as Shun Wakaba

Miki Sakai as Satsuki Wakaba / Gara

Karin Ogino as Bell

Mitsuru Karahashi as Punk

Sota Fukushi as Gentaro Kisaragi / Kamen Rider Fourze

Yoshiko Sengen as Yuuki Joujima

Yukana as Mezool (voice)

Ryuuzaburou Ootomo as Gara (voice)

Riki Kitazawa as Nue Yummy (voice)

Yuki Anai as Knights (voice)

Akira Kushida as O Scanner (voice)

Jouji Nakata as Birth Driver (voice) / Birth Buster (voice) / Narrator (voice)

Seizō Fukumoto as
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