The Misfortune Devouring Witch is Actually a Vampire?!

Would you pay in blood to have access to the witch’s knowledge?
Rumors about Yuuri Watoh being a witch who feeds upon the misfortune of others have kept customers away from her Eastern Medicine Shop as long as she can remember—until he showed up.
Intrigued by the rumors, Count Ernest Travis Selden, close attendant to the Hylant king and a notorious eccentric, seeks the Hinomoto witch’s specialized knowledge to solve a royal incident. But borrowing the witch’s aid comes at a steep price—one that can’t be paid in gold or jewels.
How will the stubborn shut-in vampire witch who hails from the East handle the peculiar Western Count who frequently brings her problems to solve and seems all too happy to pay the price?

[From Cross Infinite World]