Urotsukidōji: Legend of the Overfiend: Season 4

Continuing straight after the climax of Return of the Overfiend, Jyaku and the survivors head for Osaka to help the Overfiend after his climatic battle. On the way they find a kingdom where children rule over adults (OVAs 1 and 2). Jyaku’s problems are furthered when an old nemesis shows up at the wrong time (OVA 3).