Holy Knight
English title: Holy Knight
Japanese title: Holy Knight (ホーリーナイト)
Type: OVA
Episodes: 2
Source: Manga
Genres: Fantasy, Ecchi
Studios: Lyrics
Producers: Cammot
Duration: 28 min per ep
Rating: R+ - Mild Nudity

The story centers around a timid orphan named Mizumura Shinta who goes to a missionary school in Tokyo. His seemingly normal life changes when a beautiful half-human Romanian girl named Lilith suddenly transfers into his school. Mizumura discovers that he is actually a vampire hunter and the successor of the Romuald lineage.

(Source: ANN)