(said earlier today, only to discover poster was not a member)
Oh man. How about a guy/gal who switches high-schools to a private school. Now, this guy/gal is secretly a psychopath, and intends to kill everyone at their new school.. Little do they know that they're attending a high-school for demons, and you can't just stab a demon to kill them. They go bat-poop crazy to find out why everybody they kill comes back the next day.
When they do find out, they study killing demons, and become so EFFing good at killing demons that eventually they stop being a mass murderer and start being a demon hunter.
Bonus points if they fall in love with a succubus who also wants to kill everybody, and they both must resist the urge to kill each other.
SOMEBODY MAKE THIS A THING.
