Bundled with the 5th volume of the Kekkai Sensen: Back 2 Back manga.

The stand-alone pilot OVA which was shown as part of the "Jump Super Anime Tour" of 1998.

The mutinous Musashi has been defeated, and the girls from Yokosuka Girls' Marine High School are safely back home. However, the Harekaze sustained critical damage during its final encounter with the Musashi and may not be able to sail again. Moreover, rumors spread that the Harekaze-class will be dissolved due to it lacking a ship. Other classes' attempts to scout members from the Harekaze's crew only make the situation even more uncertain. The answer to this dire problem may be found in the sealed orders that the secretary of the Harekaze, Kouko Nosa, is to deliver to its crewmembers. But time is running short...

During the height of World War II, Nazi Germany seeks to strengthen their soldiers with technology crafted under the influence of vampiric biology. Out of fear of this technology turning the tide of war in the Axis's favor, Sir Arthur Hellsing enlists his butler and soldier Walter C. Dornez and vampire Alucard to put a stop to the German plot, sending the two men into a conflict that will scar them both forever. [Written by MAL Rewrite]