A person from one universe (of TheMultiverse) falls in love with someone from an alternate universe. Or a {{Time Travel}}ler [[TimeTravelRomance falls for someone]] in the period he's visiting, or vice versa. The dilemma for the Time Traveller or dimension-hopper is how far to pursue the relationship: Maintaining such a relationship often means that one of the parties involved will have to [[IChooseToStay give up their own life in their own universe or timeline]] to fit into the other's.

May result in StarCrossedLovers. Compare StayWithTheAliens and TimeTravelRomance. Contrast DoppelgangerReplacementLoveInterest, which avoids this happening by giving one of the lovers a convenient substitute for the other one, native to their own world/time.



* ''Manga/FushigiYuugi'' and its prequels, ''Genbu Kaiden'' and ''Byakko Ibun''. As for the results... [[spoiler: Tamahome is ultimately reincarnated in Earth and reunites with Miaka. Takiko dies in Hokkan and in Uruki's arms, and their reincarnations get together again. Suzuno and Tatara are separated, but they die at the same time in their worlds and are ultimately TogetherInDeath.]]
* ''Manga/{{Inuyasha}}''. [[spoiler:At the end, Kagome stays on the Sengoku Jidai to "get married", on the words of her present day's friends. Inuyasha would've likely been alive in our world, though he cannot pass through the well anymore - and Kagome temporarily cannot either, her last "jump" into the past being the one she makes to stay with him.]]
* In ''LightNovel/TheFamiliarOfZero'' Saito is summoned by Louise to alternate world. If not for the implication that one can return to Earth by flying toward a eclipse there would be no choice possible to make it this trope.
* ''Anime/TheVisionOfEscaflowne'': [[spoiler: At the end it looks like they both returned to their own worlds, but in the final scene, Van appears riding the Escaflowne on Earth. It ends there so it's up to the viewer to interpret what happens next.]]
* ''Anime/BrigadoonMarinAndMelan'' ends with this choice. [[spoiler: Frustratingly, the anime doesn't actually say whether Marin and Melan stay together, or in which world they might stay. In the manga, they go their separate ways.]]
* In the ''LightNovel/HaruhiSuzumiya'' [[TheMovie movie]] (and fourth LightNovel), [[spoiler:Nagato's attraction to Kyon]] causes her to ''create'' an alternate universe [[spoiler:(technically, she just modifies the existing one)]] in which, unlike in the old universe, it is possible for them to become a couple. She leaves the "which universe?" decision to [[spoiler:Kyon, who decides to reset the world to its original state, partly due to his [[BelligerentSexualTension self-denied feelings for Haruhi]]. But the other option [[Manga/TheVanishingOfNagatoYukiChan is not ignored]]]].

* Toyed with and ultimately discarded for the DC vs Marvel Universe crossover (the big one that lead to the [[ComicBook/AmalgamUniverse Amalgam]] comics), where Jubilee and Tim Drake(Robin) struck up a rather sweet mini-romance that made them having to fight each other rather difficult. Due to the whole thing having since been quietly shuffled away, only a few remaining [[YueRyong shippers]] remember what might have been.
* Perhaps not quite the same thing, but in ''ComicBook/JLAAvengers'', Two cosmic entities of the DC and Marvel universes Kismet and Eternity fall for each other only to be forced apart at the mini-series' end.
** The comic had a straight example with Hawkeye, in an AlternateHistory, ditching his universe to be with Black Canary (a ShoutOut to the way Canary herself switched Earths in UsefulNotes/{{the Bronze Age|OfComicBooks}}, although she did that because she had lost, rather than gained, a lover).
* This was the main tension in the relationship between Comicbook/DoctorStrange and Clea. He was Sorcerer Supreme of his dimension and she was a member of the royal house in hers -- they never did find a way to solve the problem and eventually separated to their own worlds.
-->'''Doctor Strange:''' You and I are one, Clea. Something more than either of us. Something more than a thousand mystic sages could fathom. Our spirits are wed forever.
-->'''Clea:''' I know, Stephen. But itís the commute, isnít it?
* This occurs in the ''ComicBook/{{Runaways}}''. The kids accidentally end up in 1907. Victor falls in love with a girl and invites her to come back with them. [[spoiler: She refuses because she's too scared to leave her own time.]]
* {{Comics/Vampirella}}, in the last Warren Issue, has a Multiverse traveler falling in love with her. When things go haywire, he tries the next universe. [[note]] Bonus {{Squick}}: Selfsame traveler had been much later retconned to be the biblical Cain by Harris. And much later Cain has been retconned to be Vampirellas father by Dynamite. [[IncestIsRelative Maybe they should do the research next time...]][[/note]]

[[folder:Fan Works]]
* In ''Fanfic/OnACrossAndArrow'', both Fluttershy and Rarity end up falling in love with [[ScrewYourself their male counterparts]] (Butterscotch and Elusive, respectively). Meanwhile, Applejack and Rainbow Dash seem to be sweet on each other's male counterparts, Rainbow Blitz and [[NamesTheSame Applejack]]. There's also a hint of this with Celestia and her RuleSixtyThree-universe counterpart, Prince Solaris, at the end.
** The sequence where Rainbow Dash and Rainbow Blitz are set up to "hoofwrestle" with the opposite dimension's version of Applejack can be read as them trying to encourage each other to confess their bisexuality and homosexual crush to their own dimension's version of Applejack.
* In the JLA Watchtower universe, Starfire and Hugo. A bit of background: Watchtower was a spin-off of Livejournal [[JournalRoleplay roleplay]] Lunatic Cafe, which was a multiverse crossroads. One of the Watchtower players had a character for the Lunatic, a universe-displaced, alternate timeline version of Creator/HugoWeaving who had been slated to die in a traffic accident, but was snatched to the Lunatic. In a plot that crossed both games, an injured Nightwing stumbled into the cafe after an incident on Watchtower. Hugo was the first to intervene and saved Nightwing's life. When Nightwing's friends from Watchtower came to take him home, that universe's version of Starfire took a fancy to Hugo. A whirlwind courtship later, "Hugo Wallace Anders" was set up with a new life and identity in Watchtower-verse.

* ''Film/SomewhereInTime'' hinges on this. [[spoiler: The reply is being TogetherInDeath.]]
* ''Film/KateAndLeopold'' depends on this as well: Leopold, a Victorian Duke, travels forward in time from 1876 to 2001 and falls in love with modern woman Kate. However, if Leopold doesn't return to his own time when the temporal portal re-opens, history will be altered and any impact Leopold would have had on history (including all of his descendents and the invention of the elevator) will cease to exist. [[spoiler:He ends up going back, and Kate chooses to join him in his time rather than remain in the present.]]
* In ''Film/{{Enchanted}}'', this becomes an issue when Giselle, from the fantasy land of Andalasia, realizes she and Robert, from the land of New York, have fallen in love. [[spoiler:She stays in New York with him -- and his fiancée, Nancy, goes back to Andalasia with Giselle's fiancé Edward]].
* Doc Brown and Clara Clayton in ''Film/BackToTheFuturePartIII'' have something like this, but the fact that Clara was supposed to have died (and survived only through Doc's [[JustForPun timely]] intervention) may help simplify matters. In the end they seem to choose option C. Live sort of outside of time traveling through the past and future with their flying train.
** In ''The Game'', due to some other time-related shenanigans, [[spoiler:Doc is left in charge of his father's estate (he wasn't in the "older" timelines) and, thus, the Browns take partial residence in Doc's house in the 1980s.]]
* Amy Robbins in ''Film/TimeAfterTime''[[note]]also played by Mary Steenburgen, who played Clara Clayton in ''Back to the Future Part III''[[/note]] is a modern woman who falls in love with H.G. Wells during his trip to the 20th century. She finally decides to return with him to the 1880s.
-->'''Amy:''' "I'm not makin' any promises, but when we get back, I'm changin' my name to Susan B. Anthony".
* TheFilmOfTheBook of ''Film/PrinceCaspian'' adds romantic tension between Caspian and Susan, who are from different worlds, but have no romance at all in the original books. Interestingly, the Pevensie siblings never married in all the years they ruled Narnia, despite all but forgetting they came from another world and despite ''The Lion, the Witch, and the Wardrobe'' mentioning Susan and Lucy having many, many suitors (but the only one we ever meet personally is a [[BreakTheHaughty haughty]], [[TheEvilPrince evil prince]]).
* In ''Film/StarTrekIVTheVoyageHome,'' Dr. Gillian Taylor (the scientist responsible for taking care of the whales) chooses to go with Captain Kirk to his time - then promptly ''leaves him''. Kudos to her for staying alive, though.
** She seemed to have chosen to go to the future primarily to be with the whales rather than Kirk.
* There is a short, but deep, version of this in the original ''Film/TheTerminator''. The time machine is only one way though, so it's not like the guy had much of a choice after he arrived [[spoiler:and he dies anyway]].

* In Creator/AlanDeanFoster's ''The Time of the Transferrance'', Literature/{{Spellsinger}} Jon-Tom must choose between returning to our world and remaining in the warmlands, where his wife, friends, and magical abilities are.
* An issue for Lyra and Will in ''Literature/HisDarkMaterials'', though subverted as one can't live in the universe of another for long and [[spoiler: the doorways all have to be sealed.]]
** [[spoiler: Actually, one door can be left open, but Lyra and Will choose to stay apart so that the door opened in the world of the dead--so that the ghosts can disintegrate into the rest of the universe instead of just existing for the rest of eternity--can stay open.]]
* In Nora Roberts' ''Circle'' trilogy, each set of lovers is either from a drastically different period of time from each other, or from two different worlds.
* In ''Princes Nevermore'' by Dian Curtis Regan, Princess Quinn finds herself in the Human world- and there falls in love with a human boy. however, she is informed that [[spoiler: she will not age like he will, and she only has three days to decide if she should go home]] in the end, she[[spoiler: returns home, but she hopes one day to see him again, and he tells her he loves her]]
* In the ''1632'' novel series, all relationships (romantic, platonic and political) between "up-timers" (from the US, year 2000) and "down-timers" (from 1630s Europe) are significantly affected by cultural differences.
* In ''The Secret of the Unicorn Queen'', Sheila and Darian try to tell each other how they feel, but [[spoiler: She is returned to earth before they can say anything]] Later, When they are reunited, Sheila must decide if she can go back to her ordinary life, or if she should stay with him. she choses to [[spoiler: return home]] but[[spoiler: discovers she can SPEAK with him mind to mind!]]
* In the ''Franchise/StarTrekExpandedUniverse'' novel ''Stargazer: Three'', Andreas Nikolas is secretly infatuated with the Asmund twins. Unfortunately, Gerda and Idun were [[RaisedByNatives raised by Klingons]] (also, one of them is already in a relationship). The ''Stargazer'''s transporter then deposits an alternate universe counterpart to the twins named Gerda Idun Asmund on the ship. Unlike her duplicates, she was raised by humans and is much more friendly. He instantly falls for her, and she returns his affections. Unfortunately, she is an agent from the MirrorUniverse, send to steal the ship's chief engineer as a last-ditch effort to save the [[TheEmpire Terran Empire]] from TheAlliance. When her subterfuge is discovered, she tells Nikolas that, in her universe, they were lovers until he was killed in battle. He lets her return to her universe but wants to join her. She leaves alone but breaks down into tears on the other side. The next novel shows that this has had a tremendous impact on Nikolas and he eventually resigns.
* In Creator/BarbaraHambly's ''Literature/TheWindroseChronicles'', [[spoiler:Antryg Windrose, wizard,]] ends up [[spoiler:fleeing an order of execution in]] the Empire of Ferryth, and crossing the Void to stay with [[spoiler:his lover, Joanna Sherton,]] in 1980s Los Angelos. [[spoiler:He quickly finds work as a bartender and fortune teller, despite not thinking to omit 'wizard' from his resume.]]
** This turns out to be something of a problem, because Earth has no magic. The implications of [[spoiler:a very powerful mage]] living in a magicless world are further explored in ''Dog Wizard'' and the short story ''Firemaggot''.
** The magic situation becomes even more of a problem at the end of ''Dog Wizard'', when it's revealed that [[spoiler:the Master-Spells have fallen to Antryg, making him Archmage of the Council of Wizards back in Ferryth.]]
* In ''Literature/TimeAndAgain'' the hero thinks that the heroine will prefer his more equal-opportunities time. She's a little freaked out by it, so he moves to hers.
* ''Literature/ElevenTwentyTwoSixtyThree'' plays with this. Jake travels from 2011 to 1958 so he can prevent the Kennedy assassination, but along the way he falls in love with the lovely Sadie. At first, he plans on simply staying in the past and living out his life with Sadie, but after [[spoiler: her psychotic ex-husband destroys half her face with a kitchen knife]] he promises her he'll take her back to his time where she can receive a better treatment for the injury. [[spoiler: Ultimately he doesn't get to do either, as Lee Harvey Oswald ends up killing Sadie in 1963 instead of Kennedy.]]

[[folder:Live Action TV]]
* Several examples in ''Series/Doctor Who''.
** When Rose is [[spoiler: trapped in an Alternate Reality, she can no longer be with the Doctor. Later, a clone of him joins her in this universe.]]
** Rose's mother falls in love with the version of Pete (Rose's father) from an alternate reality.
** In Season 3, the Doctor must become human to escape The Family, and falls in love with nurse Joan Redfern. He must choose whether to remain a human and live out his life as John Smith with her, or to return to his life as a Time Lord.
* ''Series/{{Sliders}}'' had this come up more than once.
** In an early episode, a NoCelebritiesWereHarmed version of Mrs. Fields fell in love with Quinn in a universe which was dangerously short on men. Quinn slid off and left her [[spoiler:[[SomeoneToRememberHimBy pregnant]]]].
** In another, the one with the Malthusian lottery, both Rembrandt and Wade get involved with people in that universe. (Or rather, someone from that universe gets involved with Wade.) Rembrandt's interest would rather die (she's looking forward to it) than slide off, and is looking forward to his joining her; Wade's interest helps rescue them and slides off with them -- though, since this was a SeasonFinale, he is dropped with only a Handwave at the beginning of the next season.
** And in the third season, Maggie gives up an adopted universe, and Quinn gives up a short trip to his home universe, for each other.
* In ''Series/{{Farscape}}'', John has to choose between Earth and Aeryn. [[spoiler: He chooses Aeryn.]]
--> ''John'': There's no wormhole. There's no home. There's only you...
* In ''Series/{{The Flash|2014}}'', Wally West (Earth-1) and Jesse Quick (Earth-2) date despite her having to return to her Earth. Cisco Ramon (Earth-1) and Gypsy (Earth-19) have feelings for one another, but haven't taken the plunge yet.
* In the ''Series/StarTrekTheNextGeneration'' episode "Yesterday's Enterprise," (an AlternateUniverse version of) Tasha Yar returns to the past with Lt. Richard Castillo on the ''Enterprise-C''.
** That wasn't really about the feelings they had for each other, more that Yar knew she was probably dead in the original timeline, and her best chance of survival was actually to go with them.
* At the end of Creator/{{Syfy}}'s ''Series/{{Alice|2009}}'' Alice and Hatter have an awkward goodbye where they lightly suggest one of them could sometime visit the other one's world. It doesn't take long for Hatter to show up at Alice's door.
* In ''Literature/{{Neverwhere}}'', Richard Mayhew is offered the choice between his normal life in London Above and his new life in London Below ''twice''. The first time, he doesn't really understand the choice [[spoiler: and stays in London Below.]] The second, he returns to his normal life... [[spoiler: and ends up hating it so much he returns to London Below, and to the Lady Door.]]
* In ''Series/{{Life on Mars|2006}}'', Sam [[spoiler: abandons the team and wakes up]] only to change his mind and [[spoiler: commit suicide to get back, save everyone and kiss Annie]]
* Also slightly subverted in ''Series/{{Ashes to Ashes}}'' it isn't really much of a choice for Alex; she wants Gene, but wants to go home to her daughter more [[spoiler: however she realises this is impossible when she discovers she is in fact dead. So she chooses to stay with Gene, but then that's thrown out the window too as he insists she [[IWantMyBelovedToBeHappy goes to heaven instead]].]]
* The ending of ''Series/LostInAusten'' sees Amanda staying inside the world of ''PrideAndPrejudice'' to be with Darcy -- [[FridgeLogic after having systematically burned all her bridges there because she was planning on returning to the 21st century]].
* ''{{Series/Fringe}}'' plays with it a bit in the second season finale. [[spoiler: Olivia kisses Peter to convince him to return to her universe from the one he is originally from, and seemingly succeeds. However, she is then replaced by her [[EvilTwin alternate universe counterpart]], who [[TheMole goes back with Peter and Walter to spy on them]], while our Olivia is imprisoned and tortured.]]
** [[spoiler: Generally subverted as the series progresses and the alt-Olivia situation is resolved. Peter had spent most of his life thinking that he's from our side anyways, so neither seems to particularly care that they're technically from different universes.]]
** [[spoiler: Played straight near the end of the 4th season when the universes need to be walled off and Lincoln decides to leave his universe behind to be with the alternate Olivia.]]

* Roger Whittaker sings in ''The Last Farewell'' of a man who must return to his (sailing) ship to fight in the war, then (if he survives) return home to England and leave the woman he loves behind in her tropical paradise.

* Happens at the end of ''Theatre/{{Brigadoon}}''.

[[folder:Video Games]]
* In ''VideoGame/StarOceanTheSecondStory'', some of the recruitable heroes weren't born on Expel, coming from other planets and space-faring cultures. Depending on your RelationshipValues, this [[MultipleEndings can lead to]] one side of a given pairing choosing to stay on Expel to be with their loved one, or the other member deciding to accompany them into space, leaving behind their old life in the process.
** Same in the third installment: Fayt can stay on Elicoor with Albel or Nel, travel to Klaus with Cliff or Mirage, or head off to some as-yet-unknown place with Maria.
* IronMan when placed opposite of any female, humanoid character in ''VideoGame/MarvelVsCapcom3''. This ranges from Crimson Viper to [[JailBait Tron Bonne]] to [[ChineseVampire Hsien-Ko]] to [[HornyDevil Morrigan]]. The only exception? Amaterasu, who is a ''dog.''
* The Manga/FushigiYuugi video games, just like the original source, play with this trope. In ''Genbu Kaiden: Kagami no Miko'' Mariko [[spoiler: cannot stay with any guy from the Book she falls for, and the ony love interest who can stay with her is her Japanese friend Takumi]]. In ''Suzaku Ibun'', Madoka [[spoiler: more often than not has to return to Japan as well, but two special endings can be unlocked if she has enough love points - in one her beau will be reincarnated in Japan and live with her, in another she will be able to stay in the ''Universe of the Four Gods'' with him.]]
* In ''VideoGame/FireEmblemFates'' [[spoiler: [[VideoGame/FireEmblemAwakening Owain, Severa, and Inigo]]]] struggle with this trope if they marry and have children, especially considering the very real possibility that their children may choose to stay in the world they grew up in.

[[folder:Web Comics]]
* Torg has had this a couple times in ''Webcomic/SluggyFreelance''. First when he time-traveled to medieval Europe and met Valerie before she became a vampire. At first he tries to pursue a relationship with her, but backs out upon discovering that the UnresolvedSexualTension he'd had with vampire Val in his modern world was only because he looks like (and may be the reincarnation of) her dead husband. Later, when he spends a long stretch of time in the Dimension of Lame, he hooks up with that universe's version of Zoe. [[spoiler:However, she dies before they have a chance to decide between breaking off their relationship or continuing it indefinitely in a dimension that one of them will find nearly unbearable.]] After that, Torg realizes that Alt-Zoe was ''also'' just using him to replace a dead husband, namely her own dimension's version of Torg. He also realizes that she's still not the same as the Zoe from his dimension, the one he's really in love with. Pete Abrams just does ''not'' seem to want Torg to get any extra-dimensional love.
* In [[http://supernormalstep.com/?p=346 this]] ''Webcomic/SupernormalStep'' Van discourages Akela from pursuing a relationship with Fiona because of this trope.
* Brunhilda in ''Webcomic/TheKAMics'' is dating Bobby (Life) from ''Webcomic/LifeAndDeath''.
* Dark Eyes from ''Webcomic/MagicalMisfits'' got pregnant by Brian from ''Webcomic/PrismaticVodka''.
* In ''Webcomic/{{Homestuck}}'', at least a third of the extra-dimensional aliens have fallen for various human characters, and vice versa. They seem to be [[TakeAThirdOption taking a third option]], and creating a new universe entirely for all of them to live in.
** Not voluntarily. Both their home universes are doomed.
* Monday from ''Webcomic/MissingMonday'' is unable or unwilling to move to Foyle's world permanently, and Foyle is not eligible for world-hopping. Thus, Monday commutes.

[[folder:Western Animation]]
* Happens in the second ''WesternAnimation/{{Jimmy Neutron}}''/''WesternAnimation/TheFairlyOddParents'' crossover entitled "Jimmy Timmy Power Hour 2: When Nerds Collide". The obvious solution, since both shows run off the [[RuleOfFunny Twin]] [[RuleOfCool Rules]], is to throw an interdimensional dance party.

[[folder:Real Life]]
* This trope is of course based on the very real situation which lovers from different cities/countries face. Rarely played fully straight today, as most will keep some form of contact with their friends and families going, or at least have that option if they wish. In older times though, a sailor or a merchant on the silk route might have well decided to settle somewhere, with no more contact with his family back home than a few letters, half of which don't even arrive. Some trading companies went as far as shipping young women out to their trade posts as brides for the men there. The women hadn't met any of those men before deciding they were probably worth moving to the other end of the world for. This practice was often quickly abandoned, as finding a local woman turned out to be a lot more practical.