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-> '''Bingo''': Her name is Myrtle. Isn't she beautiful!
-> '''Bertie''': What happened to Daphne?
-> '''Bingo''': Daphne?
-> '''Bertie''': The one who came after Honoria?
-> '''Bingo''': Bertie, fancy, Bertie, the folly of one's youth!
-> '''Bertie''': It was only a week and a half ago.
-->-- ''Series/JeevesAndWooster''

This character is a hopeless romantic. He's madly, passionately, ''fatally'' devoted to the girl he loves. It's just that the girl he loves seems to change from week to week. When one girl rejects him (which she usually does), he is heartbroken at first, but he soon finds a new love interest, and forgets all about the old one.

Unlike TheCasanova, who strings many women along at the same time without caring about any of them, the Serial Romeo genuinely believes that each successive love is "The One", and that without her, life is not worth living. Expect this character to be completely [[GenreBlindness blind]] to the implications of having a new "True Love" every week. If called out on his fickleness, expect him to insist that his current love interest is the only person he has ever really loved, and to dismiss her predecessors as mere youthful infatuations. Expect much eye-rolling from his friends.

Note: Although this trope usually applies to men, [[UnisexTropes feel free to put female examples here as well]].

See also LookingForLoveInAllTheWrongPlaces, GirlOfTheWeek, and InLoveWithLove.
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!!Examples:

[[foldercontrol]]

[[folder:Anime and Manga]]
* Claire Stanfield from ''LightNovel/{{Baccano}}'' has a habit of falling in LoveAtFirstSight with basically every girl ever, proposing to them in all seriousness at their first meeting. [[spoiler:Chane was the first to say yes.]]
* Nana "Hachi" Komatsu from ''Manga/{{Nana}}'' was hopelessly in love with every boy she met on a serial basis, especially at the beginning of the manga.
* The ''Anime/{{Pokemon}}'' anime has Brock. But it's not (usually) because he gets rejected, but he keeps being stopped and pulled away by Misty (pulling by the ear), Max (after getting it from the former), May (on ''one'' occasion), his Bonsly (only a few times with Double-Edge), or his Croagunk (with a Poison Jab, no less).
** In later episodes, Ash's Oshawott seems to be becoming this.
* ''Franchise/SailorMoon'' has all the Sailors relatively boy-crazy but Makoto/Lita is easily the one who has definitely had the most relationships. A RunningGag when she was first introduced was to say that a random guy reminds her of one of her old boyfriends.
* Martina of ''[[LightNovel/{{Slayers}} Slayers Next]]'' falls madly in love with just about every male member of the cast she meets. The fixation on Zangulus at the end of the season lasts long enough to get her married off.
[[/folder]]

[[folder: Fanfic]]
* In ''Franchise/AceAttorney'' fanfic ''Fanfic/DirtySympathy'' Klavier has a habit of falling in love with people he randomly meets, although unlike other Serial Romeos he prefers to keep his feelings a secret and one-sided.
[[/folder]]

[[folder:Film]]
* Sameer from the Bollywood movie ''[[NoteworthyBollywoodMovies Dil Chahta Hai]]''. Unlike his friend Akash, who is TheCasanova, Sameer believes that he is truly in love which each new pretty girl he meets, and is heartbroken when they reject him. His despairing parents eventually try to set him up in an arranged marriage with a girl named Pooja. Fortunately, Sameer ends up falling in love with her, too!
[[/folder]]

[[folder:Literature]]
* ''Literature/AnAbundanceOfKatherines'': Maybe not every week, but Colin has dated more girls named Katherine than he's had years in his life.
* Claire Stanfield from ''LightNovel/{{Baccano}}'' has a history of this, literally falling in love and proposing marriage to complete strangers, almost at random. He has a hard time convincing his brothers that his relationship with [[spoiler:Chane]] is any different other than that she didn't immediately say no.
* ''Literature/TheDresdenFiles'' novel ''Literature/BloodRites'' features Arturo, who has been married (and divorced) thrice and currently has a new beau. People who know him claims that he is capable of intense love towards whoever he's got his eye on at the moment, but has a problem when the magic dies -- it is notable that in a universe where ThePowerOfLove is real, Arturo is capable of showing it towards anyone he's interested in. [[spoiler: It is revealed at the end that for the first time, he married a ''plain'' woman. Perhaps this one would last.]]
* In some of the ''Literature/{{Dragonlance}}'' Novels detailing the early lives of the Heroes of the Lance, Caramon is described this way. His brother makes some snarky remarks about his tendency to be in love with a new girl every week, though eventually he settles down with his true love Tika.
* The ''Literature/EncyclopediaBrown'' series has KidAnova Tyrone Taylor.
* ''Literature/GossipGirl'' has two. Nate Archibald and Serena van der Woodsen.
* Howl from ''Literature/HowlsMovingCastle'' pretty much defines this trope. He goes out, falls in love with a girl, spends an inordinate amount of time and effort wooing her, and then...drops her once she falls in love with him. Repeat on infinite. The first one he fails to do this to is Sophie, who turned him into a LadyKillerInLove and whom he eventually married.
* Bingo Little from Creator/PGWodehouse's ''Literature/JeevesAndWooster'' series, [[spoiler:although he eventually gets married and settles down]]. Bertie himself could count as a milder example--he falls for one GirlOfTheWeek after another, but generally ends up expressing relief when things don't work out.
* William's older brother Robert in the ''Literature/JustWilliam'' stories.
* Sansa from ''Literature/ASongOfIceAndFire'' has shades of this. She falls quite hard for [[EvilPrince Prince]] [[RoyalBrat Joffrey]] at the first hint that their parents are considering [[ArrangedMarriage bethrothing]] them. She fantasizes about marrying [[BadassGay Ser Loras]] both before and after Joffrey's [[TheCaligula true nature]] is revealed and she falls out of "love" with him, then transfers her affections wholly to [[ReplacementGoldfish Loras' brother Willas]] on being offered a secret marriage pact to him, without even [[TheUnseen meeting him.]] Seemingly the only male she DOESN'T fall in instant love with the moment a possible romantic relationship is suggested is [[spoiler:her eventual husband, Tyrion]]. Not without a certain amount of justification.
* Adolin from ''Literature/TheStormlightArchive'' is this in spades. Frequently lampshaded by his brother, and several other characters. In the second book he's fine with the prospect of an ArrangedMarriage to a woman from an insignificant house he's never met partially because by this point he's offended basically every other eligible woman, and the idea of letting someone else make the arrangements sounds good.
* Very much the case with Neal from the ''Literature/ProtectorOfTheSmall quartet by Creator/TamoraPierce, although he eventually gets over it and gets married.
* In ''Literature/WillGraysonWillGrayson'' Tiny Cooper is constantly swooning after and being heart-broken over guy after guy (after guy after guy). Apart from his gay-ness and large-ness, this is practically his defining feature.
[[/folder]]

[[folder:Live Action TV]]
* Phoebe from ''Series/{{Charmed}}'' starts out as one but eventually evolves into a Deconstruction. The endless stream of failed relationships leaves her emotionally damaged and terrified of heartbreak again. After she gets a vision of having a baby in the future, she misuses her powers to see if her relationships will go anywhere on the first date. The final season Reconstructs it when she decides to get a sperm donor and she then realises that she doesn't just want a baby, she does want love as well and a Cupid gets sent to help her overcome her relationship issues.
* Izzie from ''Series/GreysAnatomy'' is a female version. Her "true loves" include her patient Denny Duquette, George, and Alex.
* Ted Mosby from ''Series/HowIMetYourMother'' realizes that the odds of the next girl he's interested in being The One are pretty dismal. It doesn't stop him from trying.
** [[LampshadeHanging Lampshaded]] in a later episode when Lily complains about all these random girls showing up in their group photos.
* Bingo Little from ''Series/JeevesAndWooster'', in the show's first three episodes alone, is "in love" with ''four'' different girls!
* SClub7 had one as a landlady in ''LA 7'' by the name of Joannie. She has pictures of all her old boyfriends in her living room and her first episode has her describing many of the relationships in great detail to a concussed Bradley. Poor Paul actually has to pretend to be one of her boyfriends in a later episode.
* Dobie from ''Series/TheManyLovesOfDobieGillis''. The series was named that for good reason, as just about every week Dobie was chasing a new girl who he thought was the love of his life.
* Every woman Mark from ''Series/PeepShow'' meets might be The One. Even Jez has streaks of this, though he's just as likely to use a women for sex with plans to dump her ASAP.
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[[folder:Tabletop]]
* Swashbuckling adventure game, SeventhSea has the Hubris "Starcrossed" which means the game master can spend one drama die to have your character fall in love with ''another'' beautiful NPC whenever he wants.
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[[folder:Theatre]]
* The TropeNamer is Romeo from ''Theatre/RomeoAndJuliet'', who is himself something of a Serial Romeo. At the beginning of the play he is desperately in love with a girl named Rosaline, who has rejected him. Soon after, he meets Juliet, and promptly forgets his feelings for Rosaline, which he now sees as a passing infatuation. Though this only happens once in the story that we know about, goodness only knows how many more times he would have gone through this had Juliet also rejected him.
-->''Did my heart love till now? Foreswear it, sight;''\\
''For I ne'er saw true beauty till this night!''
[[/folder]]

[[folder:Video Games]]
* [[CasanovaWannabe Larry Butz]] from the ''Franchise/AceAttorney'' series is constantly either trying to get together with a woman with whom he's fallen madly in love, or just been dumped. We rarely see him actually ''in'' a relationship. This is a big part of his character, though: [[WhyDoYouKeepChangingJobs He also has a different job every time we see him]].
* Jenon of ''VideoGame/BlazeUnion'', at least from the way Garlot immediately groans and goes "well, here we go again" when he falls for Medoute.
* Lowell from ''VideoGame/TheLastStory''. [[spoiler:He actually became this way from seeing every woman he fell in love with die violently, thus resolving to never have a serious relationship ever again.]]
* A series of sidequests in ''VideoGame/ShinMegamiTenseiStrangeJourney'' involves the player character delivering love messages for a crewman named Anthony, who falls in love with a succession of female ''demons''. And the first few times, the ''music cuts out'' when Anthony confesses this fact. Eventually, Anthony grows up a little, and the last of these quests has him ask you to look up a goddess of love for advice on how to talk to ''human'' girls.
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[[folder:Web Original]]
* ''Literature/TheQuestportChronicles'': Although the Lord of Angels and Demons is treated as TheCasanova in-universe, he's actually more this trope, especially with regards to the Secret Keeper and the Queen of Rogues and Robbers.
* Rosethorn, of the Literature/WhateleyUniverse, whose first name really ''is'' Romeo. He's strikingly handsome, and has mutant powers. He tends to find Miss Right, make her over, improve her self-esteem, etc., until she dumps him. She always dumps him. Either she hates being the dumpy one in the relationship, or she becomes 'pretty' enough for other guys to see her as desirable, or the whole 'my mother is a dangerous supervillain' thing comes up and torpedoes the relationship, or...
[[/folder]]

[[folder:Western Animation]]
* A female version from ''WesternAnimation/{{Sixteen}}'' is Caitlin.
* Panini from ''WesternAnimation/{{Chowder}}''.
* ''WesternAnimation/JohnnyBravo''.
* ''WesternAnimation/PepeLePew'' from ''WesternAnimation/LooneyTunes''. At least until the tables are turned on him.
[[/folder]]
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