High School DxD Hero: Taiikukan-ura no Holy
English name: High School DxD Hero Episode 0: Holiness Behind the Gym
Genres: Action, Comedy, Romance, Ecchi
Type: Special, Episodes: 1
Aired: Apr 10, 2018
Studio: Passione
Source: Light novel
Rating: R+ - Mild Nudity
Synopsis:
Alternative version of final four episodes of High School DxD BorN.