Owari no Seraph: Kyuuketsuki Shahar
English name: Seraph of the End: Vampire Shahar
Genres: Action, Drama, Supernatural
Type: OVA, Episodes: 1
Aired: May 2, 2016
Studio: Wit Studio
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
The story is set before the main story's "Battle in Nagoya" arc.

The Shinoa Squad receives another mission from Guren; to rescue a human girl named Riko from a mysterious vampire, Shahar, and bring her back to her family. However, Ferid and Crowley also appear when they find Shahar. Can Yuuichirou save the girl?

(Source: Crunchyroll)