Strike the Blood: Kingdom of the Valkyria is a oVA anime that premiered in fall 2015, produced by SILVER LINK..

About the production: the story comes from a light novel, there are 2 episodes of about 23 minutes and its current status is "finished".

Its main genres are action, ecchi and fantasy, with themes such as Vampire, Super Power and Female Harem.

On AniList, Strike the Blood: Kingdom of the Valkyria has an average score of 69%, a good score, and appears on 22,050 users' lists.

Kojou and Yukina are on their way to school as usual when they find La Folia being chased by someone. Yukina crosses blades with the enormous man who's pursuing her, but before the fight can escalate further, La Folia makes a shocking comment: "Father, this is the Fourth Progenitor, Akatsuki Kojou... my first!" La Folia's father, Lucas, had told her to decide who she wished to marry, so she declares that Kojou is her choice. Lucas refuses to accept this, but then La Folia's mother, Polifonia, invites Kojou and Yukina to a party so they can all talk in more detail. When they arrive at the party, they discover that Asagi, Yaze, Nagisa, and Sayaka have been invited as well, due to their connections with Kojou. What sort of heated battle is about to break out between the many girls in Kojou's life?! (Source: Crunchyroll)

Official synopsis from AniList.