- The Power of Love rules supreme and Interspecies Romance ensues;
- They are forced to part ways despite still loving each other;
- She offers him to make him just like her and he agrees (very common for vampires);
- Occasionally, this is done to save his life via an Emergency Transformation; the relationship may or may not survive this act.
- Alternately, he manages to purify her, assuming her condition is reversible and seen as bad. A Cute Ghost Girl might find her body in coma state in hospital. God may "punish" an angel by turning her into mundane human.
- One of them just can't get over it and breaks up.
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Anime and Manga
- Eureka Seven: Eureka is actually a Human Alien. Renton finds out late in the series, by which point he doesn't care, even after she starts changing.
- Dusk Maiden of Amnesia: Teiichi doesn't realize Yuuko is a ghost when he first meets her.
- From Vampire Knight, we have Yuki, a human, falling in love with the vampire Kaname. But then we find out that Yuki is actually a vampire as well. All the students at the Night School are secretly vampires.
- Space Pirate Mito relates the story of her own reveal to her beloved Kagero to her Half-Human Hybrid son Aoi and asserts that he is the living embodiment of The Power of Love because Kagero married her anyway. Aoi later gets a reveal of his own when the girl he's fallen for turns out to be a Human Alien Galactic Patrol officer staking him out to capture his mother.
- In Tokyo Ghoul, it's Gender Flipped.
- Nishiki has a human girlfriend as part of his efforts to blend in with human society. When he's critically injured by Kaneki and she comes to check on him, he attacks her in desperation but is too weak to overpower her. To his surprise, once she gets over her shock at discovering he's a Ghoul, Kimi accepts him and helps protect his secret.
- Similarly, Yoshimura once had a human lover that discovered his secret. She readily accepted him, though this eventually led to tragedy and their murderous Half-Human Hybrid child.
- Gender Flipped in 'Shadows Of The Past' as Will mentions how he showed Sarah what he really was when they were dating.
- In the My Little Pony: Friendship Is Magic fic Fluttershy Is Free, this is what happens to Fluttershy's mother, when she wakes up just a bit too soon and discovers she's lain with a Changeling.
- Gender Flipped in Red Lightning when Double-D is forced to reveal he's a Super-Psycho to Marie after Conner accidently outs him.
- Gender Flipped in Son of the Desert Hohenheim tells Trisha of his true nature as an immortal the night before they get married. Trisha takes it rather well after her shock over his actual age.
Films — Animated
- Played with in Shrek: Princess Fiona finds out that the knight who saved her, the title character, is an ogre. Fiona is taken aback, but continues to travel with him anyway. One reason is because, before they got to know each other, he was only planning to take her to Lord Farquaad, rather than for himself. The other reason is the fact that she's cursed to turn into an ogre herself by night.
- The ending of Shrek 2 has Lillian discovering that her husband Harold is actually a frog who was turned into a human by the Fairy Godmother. Like Fiona their daughter she takes it very well.
Films — Live-Action
- The Deaths of Ian Stone has a peculiar relationship to this trope. In the very beginning, everyone in the setting seems clearly human or clearly inhuman. The second iteration of the main character's Dream Within a Dream reveals that his secondary love interest is both completely inhuman and willing to kill him if he finds out about it. A later iteration reveals that he's inhuman too, albeit with Laser-Guided Amnesia. Unlike most examples, this isn't about the human primary love interest learning to accept him—rather, he learns to think and feel like a human.
- Galaxy Quest. Fred Kwan and Lailari, who he thinks is a Human Alien. He's quite wrong. But he doesn't care.
- The Man Who Fell to Earth gender flips and deconstructs this with alien Thomas Jerome Newton and his Earthly mistress Mary-Lou. They actually consummate their relationship before he reveals his true, Rubber-Forehead Alien form to her. Once he does, their already-troubled relationship is only further damaged — out of his disguise, he's not capable of lovemaking in the human manner, and she finds him physically hideous anyway. They ultimately fall out of love with each other.
- The Bermuda Depths: Magnus and Jennie, servant of a sea demon.
- In Halloweentown III, Dylan (a half-human warlock who Does Not Like Magic) gets involved with a girl just as dorky as he is, only to find out she's a furry pink troll wearing a costume. He reacts badly, tries to apologize, only for her to respond that he looks weird and ugly to her too. By the end of the movie they've made up and are about to have their big kiss...but she suddenly backs out of it, he acts relieved, and they agree that they're Better as Friends.
- Dark Angel: The Ascent: Veronica doesn't reveal that she's a demon until after she and Max have already made love. He's a bit startled by her claws and wings at first, but ultimately doesn't mind.
Folklore and Mythology
- There's a Japanese myth about Yuki-Onna, which plot was used for the Tales from the Darkside: The Movie mentioned above.
- Older Than Print: Kitsune are subject to this trope. Kitsune-wives usually left when their true nature was exposed, but in at least one tale, the husband called after her, reassuring her of welcome, so she returned, but only at night.
- The Selkie myths of Ireland, almost exactly the same as the kitsune-wives, but the men capture the women by hiding the pelts that let them turn back into seals.
- The Huldra women of Norwegian folklore become mortal and gain souls when they are married to a man. However, they still keep their magic and freakish strength, much to the peril of unfaithful husbands.
- Subverted in an Arab folktale. A daughter of a ghoul (human-eating monster) winds up with some of its magical powers. She nearly gets married to a prince except for the presence of another girl. She throws herself into an oven and reforms, leaving fresh bread ready in the oven to start a welcoming feast for the prince. The other girl claims similar abilities, throws herself into the oven, and burns to death.
- The medieval story of Melusine, which dates back at least to the 12th century, tells of a knight marrying a woman called Melusine:
- One version is she marries him on condition that he never look at her naked. One day his curiosity got the better of him and he peeked while she was taking a bath. To his horror he saw that she had a snake-like tail, showing she was a water-sprite or mermaid. When she realized that her secret was out, she left through the window, never to be seen again. In the most common version of the story, this Melusine is the supposed ancestress of the French Lusignan family. How this could be the case when her husband couldn't see her naked is probably best ignored.
- Another version had the condition that she be allowed to be alone, locking herself in her room, every Saturday or Sunday till noon, and the knight would never try to look at or visit her then. This was because she was cursed -by her mother!- to turn into a serpent from the waist down during that time, and did not wish him to know. All of her children were born with some slight deformity, but were otherwise brave, good, and fortunate. But the whispers that the children were deformed because they were not his became too much for the knight, and he spied on her. When she found out, she left him, never to be seen again.
- In Greek Mythology there were a few examples of this type. For instance, male gods would occasionally reveal who they were on taking leave from the woman they had just impregnated. In a more spectacular example, Hera posed as an old woman to trick Semele, one of her husband Zeus' lovers, into getting him to promise to do her a favour and then make that favour to show himself to her in his true form. She did not survive the experience.
- In Philip José Farmer's The Lovers a man from an oppressive puritan theocracy meets the girl of his dreams in another planet. Except that she's actually a lalitha a highly evolved arthropod.
- In Cinder, the cyborg Cinder falls in love with the human Prince Kai, but at the ball is revealed to be a cyborg and a member of a race of people living on the moon called Lunar.
- In Mysterious Ways: A Divine Comedy, Lilly (angel, and dragon-slayer) finds out that Alex is actually two-thirds dragon.
- In the Mistborn novel Shadows of Self, an insane, homicidal, ancient shapeshifter reveals that it was Wax's deceased wife Lessie, and that their god had sent it undercover to protect Wax before it genuinely fell for him. Since Wax had killed "Lessie" by accident, and had just mortally wounded the shapeshifter, he takes it... poorly.
Live Action TV
- Night Gallery, a show famous for its twist endings, liked this one.
- Isabel in Roswell married Jesse Ramirez, who was human, but he didn't find out Isabel was an alien until later in season 3.
- Big Wolf on Campus in the second season has this. Human girl Lori Baxter dates werewolf Tommy Dawkins. However, towards the end of the season, they break up because their relationship was getting in the way of their monster fighting.
- The main character of Moonlight was turned into a vampire by his wife on their wedding night, who forgot to run it by him first before doing so.
- True Blood has Tara and Sam, human meets shifter.
- Being Human (UK) has werewolf George fall in love with regular human Nina.
- In Season 2, ghost Annie goes on a date with human Saul Except he's not so normal himself..., and seemed to have feeling towards normal human Hugh. Also vampire Mitchell is falling for regular human Lucy.
- Buffy the Vampire Slayer:
- Subverted with Tara, who thinks she's a demon and goes to considerable length to prevent Willow from finding out. Turns out she's not; it was just part of her abusive family's "spin to keep the ladies in line".
- Xander has been referred to as a "demon magnet", as a good deal of the girls he falls for turn out to be not so human. In "Teacher's Pet" he has crush on a substitute teacher, who is actually a giant praying mantis that wants to mate and then eat his head. He later falls for "Inca Mummy Girl", and in season seven he goes on a date with a nice girl who changes her eye colour and offers him as a sacrifice to open the Hellmouth.
- Buffy discovers that Angel is a vampire.
- Willow's relationship with Oz is blooming, and then she discovers he is a werewolf. (Though he only found out less than a day before she did.)
- Played with extensively in Season 4: Riley discovers Buffy is the slayer (which means demon infused) as she discovers he is a superagent (which is ultimately revealed to be a little bionic).
- Charmed: Mid-way through series 1 it's revealed that Piper's (then) boyfriend Leo is not human and that he's a whitelighter. There had been a few comedic suspicions about him prior to the reveal due to Piper's bad luck with men (her boyfriends often ended up being revealed as evil warlocks) but the reveal that he's their guardian angel does come as a shock to all of them. Since whitelighter/witch romances are traditionally forbidden, the couple do spend most of the entire eight seasons struggling to make it work before everything finally works out in the end. Subverted in that whitelighters are actually born human but are transformed into whitelighters and can be turned back into humans if the occasion demands. All three of their children are half-whitelighter, half-witch.
- On The Vampire Diaries, Elena unexpectedly meets Stefan and feels an instant connection with him in season one. However, Stefan is hiding a deep, dark secret: he is a century old vampire. As Stefan and Elena fall harder for each other, Elena eventually discovers that Stefan is a vampire.
- In The Outer Limits (1995) episode "First Anniversary", two aliens are stranded on Earth use their power to fool people's senses in order to pass as human. Specifically, as very pretty human women who act romantically interested in some rather plain-looking men. Unfortunately, people tend to become resistant to their power after about a year or so, and the men who marry them tend to Go Mad from the Revelation after seeing their true appearances. (In an aversion of Take Our Word for It, when they let down their disguise, it's on-screen - and they really are horrifying.)
- Red's backstory in the first season of Once Upon a Time includes this. Her boyfriend didn't know he was dating a werewolf. Course, Red didn't know that either, and, thinking it's he who is the wolf, ties him up before the change can take him. Then she turns into the wolf and kills him. Oops.
- In the Doctor Who episode "The Unicorn and the Wasp," the Unicorn refers to the nickname of a jewel thief. The Wasp refers to either Lady Eddison's former lover, who appears only in flashback, who initially appeared human but then revealed himself as a member of an alien race that resembles giant wasps, or the child they conceived together, who's also able to take human form, though he became a priest and thus never had a lover to reveal himself to.
- There was a subplot in the Game Boy Advance RPG Robopon 2 based around this. You have to round up a group of alien schoolgirls on a field trip from the moon (It Makes Sense in Context) and one of them disguises herself as a human and has a guy fall in love with her. You chase them all over the world map. When she finally admits to him that she's an alien, he says that he'll love her no matter what.
- This is one of the possible endings in the Interactive Fiction game Afflicted, where you are a restaurant inspector who stumbles across a feud between vampires. After the player reassembles Sofia's body, he can agree to be turned into a vampire himself; if you simply leave Nikolai's Bar afterwards, Sofia ends up moving in with you.
- Teddie's crush on Labrys in Persona 4: Arena inverts this. He meets her thinking she was a normal human girl, feeling ashamed of his own non human nature when it is revealed to her soon after. The eventual reveal that she isn't human either, but an amnesiac battle android only makes him more enthusiastic about winning her for himself, if anything.
- Ow, my sanity, explicitly a deconstruction of the Magical Girlfriend genre, pairs a human with a Humanoid Abomination. The strip is ongoing, but it looks like said human is going to get an Unwanted Harem composed entirely of Lovecraftian monstrosities.
- xkcd has this comic, where the reveal shows unexpected dangers of online dating.
- The comic Orange Marmalade focuses heavily on the main character Ma-ri's dilemma to both keep the fact she is a vampire hidden from her boyfriend but also struggling over whether or not she should tell him she is. When he eventually discovers the truth from a third party, he is disgusted and horrified to say the least.
- Parodied by a Show Within a Show soap opera in Johnny Bravo, wherein a woman confesses to her lover that she is not what she appears, revealing herself to be a giant dalmatian. In another episode, Johnny goes on a date with a deer. No, not a humanoid deer, part-deer human, anything like that - an actual, albeit talking, deer. In another episode, Johnny goes on a date with a woman who turns out to be a werewolf, and he's actually desperate enough to try to make it work, until he discovers she's hiding an even worse secret.
- One episode plays with this trope, in that Johnny goes out on a date with a vampire woman who the audience knows from the start isn't human, but he remains blissfully unaware until the episode's end. She ends up going back to her old (vampire) boyfriend at that point, and Johnny handles the vampire thing pretty well.
- Done in Scooby-Doo and the Alien Invaders when Shaggy fell in love with a girl who was heavily into '60s culture. She turned out to be a Green-Skinned Space Babe in disguise (her clothes and mannerisms having been a result of Aliens Steal Cable), and had to leave Earth at the end of the episode.
Velma: When I said there was someone out there for you, I didn't mean out there.
- Super Robot Monkey Team Hyperforce Go!: Chiro's girlfriend is revealed to be a robot. He doesn't mind, though.