Hellsing OVA 1
The first episode of Hellsing OVA covers the first volume of the Hellsing manga. There is an outbreak in vampire activity in the CheddarVillage. A group of MI-6, including Victoria Seras gets sent in to investigate is being wiped out by the vampire - priest, who wants to turn everyone into ghouls and create a ghoul army. Integra Hellsing, the leader of the Hellsing organization, takes the matters in her own hands, sending another vampire - Alucard to destroy the priest. During the battle the vampire priest takes Seras Victoria hostage and Alucard shoots through her to hit the priest's heart. After the vampire priest dies, Alucard gives dying Seras a choice - to die or to become a vampire. Seras chooses to become a vampire. After a few weeks, Seras and Alucard get sent to Ireland where the mass ghoul outbreak is taking place. In Ireland, they encounter Paladin Alexander Anderson whose job just like Alucard's is to destroy vampires. They start a fight, which resulted in Alucard's head being chopped off and Alucard showing his true power...
Here's a trailer of OVA 1
Property of Geneon. Not mine