Itadaki Seieki, also goes by Vampire Vixen, is a one episode OVA that’s 23 minutes long. It takes its source material from a manga of the same name.
As it turns out, Mari cannot stand the taste of raw blood but will perish without the nutrients it contains. Kanzaki is quick to find a solution, offering her a different bodily fluid to consume—and Setogaya instantly falls head over heels with this new flavor. The two soon start meeting regularly, and as time goes by, their relationship evolves into something more than just casual “meals” spent together.
When Kanzaki receives a letter from Mari Setogaya asking to meet in their school’s PE storage room during the lunch break, he believes he will be receiving a love confession. He turns up eagerly, only to be attacked by his supposed admirer. The beautiful girl tries to knock him unconscious, but when she fails miserably, she explains that she is a vampire and had wanted to feed on him. Feeling pity for her hopeless state, Kanzaki reluctantly yields and allows her to drink his blood.
Itadaki Seieki is a romance, at the end anyway. This also falls under Hanime Red. And I’ll add it to a vampire list I’m adding here soon. Anyway, buy the disc above or grab the streaming service below to continue to watch.