Eiji Hino is a wanderer who has no place to call home and a tragic past. When metallic creatures known as the Greeed awaken after their 800-year slumber to attack humans and feed off of their desires, the disembodied arm of the Greeed named Ankh gives Eiji a belt and three Medals to fight the other Greeed as Kamen Rider OOO. The mysterious Kougami Foundation approaches Eiji and begins assisting him in his fight against the Greeed, though their true motives are not clear. As Eiji fights the Greeed and their Yummy monsters, learning more about the Greeed and Ankh, he starts to find a purpose beyond his journey.
Medals, Underwear, and a Mysterious Arm (Tập 1)
Biên kịch: Yasuko Kobayashi
Ngày phát sóng: 2010-09-05
Thời lượng: 23 min
Tổng quan: 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.
Desire, Ice Pops, and Presents (Tập 2)
Ngày phát sóng: 2010-09-12
Tổng quan: Ankh explains the Greeed and the purpose of the Medals to Eiji, even as the human desires to merely use his new power to fight for good instead of for selfish needs.
A Cat, Evolution, and a Glutton (Tập 3)
Ngày phát sóng: 2010-09-19
Tổng quan: Ankh becomes troubled when Eiji prevents him from eliminating his possessed body's sister while another Greeed uses a man's gluttony to create more Medals.
Doubt, a Picture Message, and a Helping Hand (Tập 4)
Biên kịch: Yasuko Kobayashi
Ngày phát sóng: 2010-09-26
Tổng quan: Ankh threatens to leave OOO for Kazari and the Greeed while investigating the evolution of humanity while Eiji tries to find more about Hina.
A Game of Tag, a Nest, and a Rich Girl (Tập 5)
Ngày phát sóng: 2010-10-03
Tổng quan: Kougami asks for a share of Eiji and Ankh's Medals, while Mezool decides to use Hina's shopaholic classmate to create a new Yummy.
Fashion, a Contract, and the Strongest Combo (Tập 6)
Ngày phát sóng: 2010-10-10
Tổng quan: Hina confronts Yamano's shopping addiction when her father goes bankrupt while Ankh confronts Kougami about his share deal of the Cell Medals.
A Lousy Husband, a Trap, and a Jackpot (Tập 7)
Ngày phát sóng: 2010-10-17
Tổng quan: Eiji tries to research a husband bullied by his wife that is being mocked by Gamel while Ankh follows a lead for a missing Core Medal.
Sabotage, Having No Greed, and Taking a Break (Tập 8)
Ngày phát sóng: 2010-10-24
Tổng quan: Amidst Hino's failed attempts at stopping the Komoris' argument, Momoko takes the winning scratchcard and throws it into a nearby river. As Takeshi frantically searches for it, she reveals to Hino why Takeshi has become so greedy.
Drenched, the Past, and the Scorching Combo (Tập 9)
Ngày phát sóng: 2010-10-31
Tổng quan: In flashbacks, Eiji fails to save a girl amidst a foreign civil war. In the present, Satonaka meets with Eiji to collect Kougami's fee until an explosion occurs outside.
A Fist, an Experiment, and a Super Bike (Tập 10)
Ngày phát sóng: 2010-11-07
Tổng quan: As Maki observes the bomber, Kougami Biotech Laboratory technician Toru Tadano, Ankh scolds Eiji, who later discovers Maki's whereabouts.
A Traveler, a Swallowtail, and a Celebrity (Tập 11)
Ngày phát sóng: 2010-11-14
Tổng quan: Eiji encounters an old friend and globetrotting blogger, Keisuke Tsukuba, who has come to Japan to find a publisher for his work.
An Eel, the World, and the Gravity Combo (Tập 12)
Ngày phát sóng: 2010-11-21
Tổng quan: Following Goto's attack, the Ageha Yummy retreats again while Eiji learns of Goto's distate towards him.
