: The series consists of 4 episodes in total, with Episode 4 serving as the conclusion.

In this finale, the betrayal by the antagonist reaches its climax. Having captured both Ingrid and Murasaki, Kiryuu subjects them to various forms of psychological and physical torment. Key Plot Points :

, the leader of Nomad, appears in the episode as the investigation into Kiryuu's betrayal concludes.

(also known as The Dark Knight Ingrid ) is the final episode of an adult OVA (Original Video Animation) released in 2009.