A sarcophagus in the museum warehouse was opened due to an accident, and the Greeed, which had been sealed for 800 years, was resurrected. The resurrected Greed's powers were not complete, so they created "Yummy" from the coins that made up the body. Yummy grows by feeding on human desires, and the coins in its body will also increase. Greeed collects coins with this. Eiji Hino, a young man without ideals and desires who was accidentally involved in the resurrection incident, fought against Yummy because of his own sense of justice. Ankh, one of the five Greeeds, cannot transform except for his right hand due to lack of coins. Ankh took a fancy to Eiji's simple character, so he handed the OOO Driver to Eiji, and asked him to transform into Kamen Rider OOO to kill Yummy, and get coins from it. How will the battle in Kamen Rider OOO be like? Can Ankh regain his body? At the same time, what is the purpose of the "Hongshang Foundation" that has a close relationship with Greed? With many mysteries, the story of Kamen Rider OOO begins...
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