Vampire-Werewolf Love Triangle

""The vampire is the slick sophisticated guy, the werewolf is the butch blue-collar guy, the girl can only pick one and so on... [...] Plus the vampires mostly have a kind of European thing going on while the werewolves are all native Americans, so there's a kind of racial-cultural thing happening... All right, you know what? You could probably make a good movie out of that. I mean, they didn't, but... you know... I guess you could.""

- MovieBob's review of New Moon

This Trope is Exactly What It Says On the Tin. When Romance Ensues in a continuity featuring Fur Against Fang, the result tends to end up including a Love Triangle featuring a vampire and a werewolf as two of the three members.

Usually also involves Feuding Families, Fur Against Fang, Maligned Mixed Marriage, Star Crossed Lovers.

Anime & Manga

 * In Dance in The Vampire Bund, Mina's the vampire, Akira is the werewolf, and the Royal Three make up the third party as a whole. There's also the odd triangle between Mina, Akira, and Yuki, who is in love with Akira and has a lot of mutual Les Yay with Mina.
 * Subverted in CrescentMoon.
 * Hell, the werewolf and vampire aren't even competing. The werewolf is interested in an entirely different girl than the heroine.
 * In Inuyasha, Tsundere Kagome likes Inuyasha (who is a dog hanyou, which is similar to a werewolf), and he used to love Kikyo (Kagome's past life), who becomes essentially an undead soul - energy eater, and Koga, a wolf youkai, is in love with Kagome.
 * In Rosario to Vampire, the Werewolf is a Handsome Lech attracted to Friendly Neighborhood Vampire Moka, who spurns him for Unlucky Everydude Tsukune. Of course, given the type of manga this is, it's a lot more complicated than just a triangle.
 * Princess Resurrection contains a distaff counterpart where a female werewolf Liza and a female vampire Reiri are both attracted to Unlucky Everydude human male.
 * In actuality, neither sees him as a romantic interest, more as a plaything or underage drinking buddy. Now, how they, especially Reiri, view his mistress Hime on the other hand...

Literature

 * Anita Blake. In addition to being a love triangle, the metaphysical bonds formed between the human necromancer, the vampire and the werewolf makes all of them more powerful.
 * Twilight: This is, fundamentally, the plot of the series.
 * The Sookie Stackhouse Mysteries and its HBO adaptation, True Blood.
 * Though on the other hand, Sookie
 * In the Discworld book Thud, Angua the werewolf is in a relationship with Carrot, but Sally the vampire develops a crush on him and an intense rivalry develops between the girls, which is only intensified by instinctual Fur Against Fang.
 * Actually, the rivalry (and instinctual dislike) seems to be mostly in Angua's mind. Sally admits that she's attracted to Carrot, but knows that she doesn't really have a chance; his heart beat picks up whenever Angua is around.
 * Somewhat true in Patricia Briggs' Mercedes Thompson books. The titular character has to choose between two werewolves: teenage crush Samuel and next-door-neighbor Adam, but she also has a rather close relationship with vampire Stefan, whose unrequited crush seems very likely to stay unrequited.
 * In the fifth book she but this remains pretty central to the plot for most of the series. However, Stefan is only really a contender in his own mind, as Mercedes has plenty of good reasons to dislike vampires.
 * The Mortal Instruments series has an unusual variation on this. There's a werewolf-vampire-human love triangle—but the vampire is at the center of it.

Film

 * Played totally straight in the Twilight series.
 * Amusingly subverted in Underworld. Vampire Kraven thinks he's in a love triangle with Vampire Assassin Selene and the series' Unfazed Everyman, Michael. And the werewolves are trying to turn Michael to their side before she gets a hold of him. He's dead wrong, though, since she thinks he's a power hungry coward. Hell, at that point in the story, she doesn't even have a romantic interest in Michael yet... Kraven is just so narcissistic as to think she's in love with him, and it infuriates him to even consider that she could choose Michael over him.
 * Of course, she does eventually fall in love with Michael, despite him being turned into a werewolf against his will. She even tries mightily to protect him from other vampires and herself (considering she usually kills werewolves on sight). Kraven tries to win her over again (despite having been exposed as a traitor to all vampires) and at this time she literally shoots him down, though she fails to kill him (not for lack of trying)..
 * In Van Helsing, the title character was in the process of becoming a werewolf when Dracula kidnapped his love interest and tried to seduce her.

Live-Action TV

 * Young Dracula is an example of this, because Vlad's mother ran off with a werewolf. In this case, that means a vampire running away from her vampire husband(and children) to a werewolf lover.
 * Wizards of Waverly Place twists this around with Juliet briefly falling into one between Justin and Mason.
 * At the center of a really Egregious episode of CSI.
 * The Vampire Diaries starts playing with it in the second season, with.
 * The first series of True Blood comes close to being this, with a doggy shapeshifter instead the standard werewolf.
 * House of Frankenstein 1997 features vampire (the Big Bad), the Love Interest (a woman bitten by a werewolf) and the hero (the cop). Lampshaded when a monster expert mentions that vampires love lycanthropes; "Their own little animal -- you know what men are like."

Video Games

 * Fatal Hearts, IIRC.
 * Love Drops
 * Averted in the Girls Love Visual Novel Akai Ito, despite having premise of Lesbian Vampire versus Beastess and each of them have a route. Due to the way the routes are written, you can't connect to another character when you're already connected to someone.
 * A weird version of this appears to be going on between Vulcanus/Valvatorez/Fenrich in Disgaea 4 a Promise Unforgotten. Of note to what makes it weird: There's no human in the triangle (Vulcanus is an angel ), the vampire is at the center of the triangle, and both the vampire and the werewolf are male.
 * There is, however, a Bad End where Token Human Fuka makes Valvatorez and Fenrich her harem. They're not happy with it, particularly since she makes them wear maid outfits.

Western Animation

 * In the Fillmore episode, "The Unseen Reflection", feaures this as part of a Show Within a Show.