Strike the Blood: Valkyria no Oukoku-hen
English title: Strike the Blood: Kingdom of the Valkyria
Japanese title: ストライク・ザ・ブラッド　ヴァルキュリアの王国篇
Alternative titles: Strike the Blood OVA
Type: OVA
Source: Light novel
Episodes: 2
Status: Finished Airing
Aired: Nov 25, 2015 to Dec 23, 2015
Duration: 23 min per ep
Rating: R+ - Mild Nudity
Studios: Barnum Studio, SILVER LINK., Connect
Producers: Movic, Warner Bros. Japan, KlockWorx, ASCII Media Works, Hakuhodo DY Music & Pictures
Genres: Action, Fantasy, Ecchi
Themes: Harem, School, Urban Fantasy, Vampire

It was officially announced at the Dengeki Game Festival 2015 event that Strike the Blood will be getting a two-episode OVA series to be released at the end of 2015. The OVA will be an original story written by Gakuto Mikumo.

(Source: MAL News)