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.
E1: Medals, Underwear, and the Mysterious Arm▶ PLAY
E2: Desire, Ice Pops, and Presents▶ PLAY
E3: A Cat, Evolution, and a Glutton▶ PLAY
E4: Doubt, a Picture Message, and a Helping Hand▶ PLAY
E5: A Game of Tag, a Nest, and a Rich Girl▶ PLAY
E6: Fashion, a Contract, and the Strongest Combo▶ PLAY
E7: A Lousy Husband, a Trap, and a Jackpot▶ PLAY
E8: Sabotage, Unselfish, and Taking a Break▶ PLAY
E9: Drenched, the Past, and the Scorching Combo▶ PLAY
E10: A Fist, an Experiment, and a Super Bike▶ PLAY
E11: The Traveler, a Swallowtail Butterfly, and a Celebrity▶ PLAY
E12: An Eel, the World, and the Gravity Combo▶ PLAY
E13: A Siamese Cat, Stress and the Genius Surgeon▶ PLAY
E14: Pride, Surgery, and a Secret▶ PLAY
E15: The Medal Struggles, the Transporter, and the Vessel▶ PLAY
E16: An End, the Greeed, and a New Rider▶ PLAY
E17: The Kendo Girl, Oden, and the Splitting Yummy▶ PLAY
E18: Destruction, Motives, and the Eel Whip▶ PLAY
E19: The Red Medal, the Detective, and Betrayal▶ PLAY
E20: The Decoy, Quantification, and the Flaming Combo▶ PLAY
E21: The Grasshopper, Father and Son, and the Ally of Justice▶ PLAY
E22: Chocolate, Faith, and the Power of Justice▶ PLAY
E23: Beauty, an Egg, and the Sleeping Desire▶ PLAY
E24: Memories, Love, and the Marine Combo▶ PLAY
E25: The Boxer, the Left Hand, and the Bird Yummy▶ PLAY
E26: Ankh, the Ring, and Placing Everything On▶ PLAY
E27: 1000, the Movie, and the Combatmen▶ PLAY
E28: 1000, the Kamen Riders, and the Birthday▶ PLAY
E29: The Big Sister, the Doctor, and the Truth about Ankh▶ PLAY
E30: The King, the Panda, and the Flames of the Memory▶ PLAY
E31: Gratitude, Scheming, and the Purple Medal▶ PLAY
E32: The New Greeed, Emptiness, and the Invincible Combo▶ PLAY
E33: Friendship, Chaos, and the Belt Left Behind▶ PLAY
E34: The Best Friend, Uses, and Their Relationship▶ PLAY
E35: Dreams, the Big Brother, and Birth's Secret▶ PLAY
E36: Broken Dreams, the Body, and the Greeed Resurrection▶ PLAY
E37: Sleep, One Hundred Million, and the Birth Transfer▶ PLAY
E38: Circumstances, Farewell, and a Tearful Birth▶ PLAY
E39: The Nightmare, Security Cameras, and Ankh's Revenge▶ PLAY
E40: Control, a Birthday Party, and the Disappearing Ankh▶ PLAY
E41: Siblings, the Rescue, and Eiji Leaves▶ PLAY
E42: Ice, Greeedification, and Broken Wings▶ PLAY
E43: The Vulture, the Confrontation, and Ankh Returns▶ PLAY
E44: Everyone Together, the Perfect Resurrection, and Your Greed▶ PLAY
E45: The Surprise Attack, the Proto Birth, and the Desire of Love▶ PLAY
E46: The Eiji Greeed, the Double Births, and Ankh's Desire▶ PLAY
E47: The Red Crack, Satisfaction, and Eiji's Vessel▶ PLAY
E48: The Medals of Tomorrow, Underwear, and Arms Held▶ PLAY
