High School Dxd Specials -
These are 3–5 minute shorts bundled with the original Japanese DVD/BD releases. They are mostly standalone comedic skits with no impact on the main plot. Season 2 ( New ) Extras
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 High School DxD Specials
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. These are 3–5 minute shorts bundled with the
These two full-length episodes follow the first season. One focuses on a vacation to the beach—which ends with Issei in typical trouble—while the other deals with a "breast-shrinking" rumor at school. The "Must-Watch" Verdict This special episode acts as
Bundled with DxD DX.2 , this episode follows the BorN season.
If you're watching for the , most of the short specials can be skipped as they are purely for comedy. However, the full-length OVAs and the Hero: Taiikukan-ura no Holy special are highly recommended. The latter is especially critical for those confused by the changes made during Season 3, as it helps bridge the gap to the more faithful Season 4 adaptation. How To Watch High School DxD in The Right Order!