Retell Romeo and Juliet

This is from the NaNoWriMo Adopt-a-plot folder where writers post extra plots they won't be using.

#3: "Retell the story of Romeo and Juliet, only make them a vampire and a werewolf (you can pick which is which)." -- Tupwen

(It was later pointed out that this was a piece of the plot of the movie Underworld but it could go in so many different directions.)

#192: "Alternatively: Vampires and witches exist, but witches are actually vampire-hunters so the two groups, by default, hate each other. After one vampire colony was exerminated by the witches, one small boy survived and was secretly taken in by a witch who felt sorry. At age 18, the vampire escapes. He has all his vampire instincts but was raised by someone 'good', so none of his kind would accept him. Living on the fringes of society he meets a young witch and they fall in love against their better judgement. Chaos ensues." -- BlackEyedGirl

Or how about an angel and a devil, a fire demon and a water sprite, an anthrocat and and anthrowolf (their cultures and social structures they'd grown up in would be totally different), Ranma and Akane (from Ranma 1/2) ...