An...interesting series to say the least. It mainly centers around a vampire who, while promising to keep a human out of harms way after she mistakingly entered the deamon realm, accidentally doesn't pay attention while fighting off someone and she accidentally gets killed by man-eating plants. However, she's still technically alive, she just becomes a ghost due to dying in the demon world place. The whole basic plot is him finding ways she could come back to life since he made a promise and he keeps good on his promises. One big roadblock in their way is how every time someone has a solution tobringing a ghost back to life, it falls flat because of plot inconvenience causing that method to not be able to work.

Great animation and I love that since the campire guy is a total weeb, he makes constant anime references that only the ghost girl knows, so she gets embarassed while everyone thinks he's coming up with one-liners on the spot.