Hundreds of years have passed since humanity began to be frightened by the threat of vampires.
People have begun to use the same power to counter vampires who use a powerful power called Tornolia.
One day, rumors about a vampire attack on a city were flowing.
This is a story about William, who heard such a rumor, and his self-proclaimed assistant, a hunter in red clothes, and a while after his self-proclaimed assistant came to the city.

The official novel game of Vampire Hunter Vtuber!
William Hellsing, Rosalie Rockhart himself and the official designer will participate!
What is the fate of the two hunters who challenge the vampires in newly drawn costumes? !!