Bundled with the Hero Blu-ray, this provides the origin story of how Sirzechs and Grayfia met during the Underworld's civil war. The "Must-Watch" Verdict
This special episode acts as an alternative version of the final four episodes of BorN , helping to realign the anime's timeline more closely with the original light novels. High School DxD Specials
The extra content is generally divided into three categories: standard OVAs (which usually act as "episode 13"), short DVD/BD specials, and specific alternate-story episodes. Bundled with the Hero Blu-ray, this provides the
Bundled with DxD DX.2 , this episode follows the BorN season. Bundled with DxD DX
While the high-octane battles and supernatural politics of High School DxD draw fans in, the series' many offer a lighter, often more fanservice-heavy look at the Occult Research Club's daily life. These bite-sized adventures, often bundled with Blu-rays or light novels, provide everything from character backstories to purely comedic, non-canonical "what-if" scenarios. A Breakdown of the DxD Specials & OVAs