Kouhei meets a vampire girl named Hazuki at an old German castle, and she follows him home to Japan in order to look for her mother, but the two are constantly at battle over her unethical use of her vampire powers and embroiled in mysterious adventures.
It's just one thing after another in this series! Now that Luna is back from being kidnapped the count kidnaps Grandfather instead. Elfriede officially changes sides and helps get Grandfather back. This is another one that is heavy on the action light on the people stuff which is what I really like. I see a lot of people describe this book as funny. There are humorous bits here and there but I don't know that I would recommend this as a "funny manga". I see it as more of an action-y book.
And in this volume, Grandpa gets kidnapped, Hazuki and Kouhei go to a supper at a strange place, Hazuki risks her life for Kouhei, and Hazuki loses her memory. And... Elfriede's boobs? Totally unnecessary.