Warning: There’s one scene that has some gore in it.
Who Killed the Vampire? episode 1 (吸血鬼を殺したのは誰？episode1) by Prethloid (プレスロイド) 18 pages
It’s been a while since I did something like this, and it shows (though I’ve also gotten lazier). This story involves the Scarlet Devil Mansion. Most of it seems to just be setting things up.
Edit: I forgot to mention that Prethloid also made a video of this. It’s in Japanese, though. http://www.nicovideo.jp/watch/sm14186729