The episode follows the Occult Research Club as they take a break from their supernatural duties for a beach outing. The focus is largely on comedic fanservice:
Rias and Akeno engage in a playful but intense competition for Issei’s attention. Highschool DxD BorN Specials Episode 1
For deeper dives into the series' lore, the High School DxD Wiki provides detailed breakdowns of every episode and special. The episode follows the Occult Research Club as