Shintaro is practicing his marksmanship on the Ride Vendor when Satonaka arrives to tell him that he will taking over for her as Kougami's aide while she takes a vacation. At the Cous Coussier, as it sports a cowboy theme, Ankh starts to snap from the stress of not only resisting the urge to kill Chiyoko but also his frustration of not being able to find his own Core Medals, despite being able to obtain the Core Medals of his fellow Greeed. Meanwhile, at a local hospital, its resident genius surgeon Kei Tamura feels that her talents are not being used. This attracts Kazari as he creates a Yummy inside her, causing her to perform unauthorized operations on her own. Sensing the Yummy's actions that night, Ankh takes Eiji to the Yummy's location, despite interference from four Waste Yummy that Eiji destroys as Kamen Rider OOO Gatatoraba. Once arriving at the hospital, Ankh uses Shingo's memories to enter the building by posing as a injured patient as Hina looks after him while Eiji runs off to find the Yummy. Finding Tamura as the Yummy takes over her to attack the hospital's director, Eiji lures her out as Ankh confronts Shintaro Goto who is also posing as an injured patient. Ankh separates himself from Shingo to knock Shintaro out before he flies off. By the time Ankh arrives to find Eiji and the Yummy, the Yummy has matured into the Siam-Neko Yummy, and Eiji transforms into Kamen Rider OOO to fight her. Assuming Sagohzo Combo, Kamen Rider OOO nearly destroys the Yummy when Tamura's semi-conscious body gets in the way. As the Yummy retreats into Tamura's body and runs off, with Eiji recovering from the Combo's strain, a fed-up Ankh flies off with Shingo's body in danger of dying.
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