Only one episode of this was partially completed, the released version containing numerous examples of animation that is missing in-between frames. The story as such concerned the arrival of the real Chojin as he/she (a hermaphrodite) makes moves to wipe out all life on Earth. 
Interestingly, the setup for the show was far more heavily connected with the first two, more popular, chapters in the Urotsukidoji saga, with appearances by Nagumo and Akemi (unseen since the early episodes of Part III), and redesigned character models that more closely resembled the earlier episodes. Some of the less popular characters introduced in chapters III and IV, particularly Buju, were nowhere to be seen. Nevertheless, such strategies did little to get this final saga off the ground and the story was shelved. 
(Source: Wikipedia)

Directly following the conclusion of Urotsukidoji III, the survivors of the Azuma kingdom genocide travel aboard a futuristic tank with Osaka as the destination. There, they plan to face both the Overfiend and their own fates as well. Along they way, the stumble upon a civilization beyond imagination, where children cruely rule over the adults. It is up to Amano Jyaku to save his friends from this sinister land and its evil ruler, Ellis. Shortly after their encounter, Sui Kaka Ju's sister Yoenhime summons Munhihausen, who transforms her into the menacing Yoenki. At last, she is strong enough to reap revenge on Amano for killing her brother. But Munhihausen has his own hidden agendas. The Urotsukidoji legend will finally reach its climax in Osaka, when Kiojo, the sweet and innocent Himi, and the Chojin meet face to face. 

There is a legend that in 3,000 years an unbeatable god of the demon world known simply as the Overfiend will be resurrected into the body of a young man. Amano, a half demon, travels to the human world to find the Overfiend before his pure demon rivals find the god-like being. Unfortunately, he keeps on being side-tracked by Tatsuo Nagumo, a shy, bumbling lecherous teen, and future classmate, that keeps finding himself in all sorts of trouble with beings from the Demon Realm. If Amano can’t find the host of the Overfiend, how is going to be able to protect him from the clutches of the oncoming demon horde? (Source: Fakku)

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