History Manga / MyBrideIsAMermaid

* CatSmile: Saru has one, although according to the other characters he's supposed to be a monkey. Lunar often has one as well.

* InvoluntaryDance: Sun and Lunar can use their MagicMusic to control people, but while Lunar likes to to send people into berserk rampages Sun prefers making people dance until they're too tired to cause trouble.

* OurMermaidsAreDifferent: A mermaid's voice can blow your eardrums or your car away. It is possessed by all female mermaids, apparently (Lunar does it often, and both Akeno and Ren do it in the finale).

* MakeMeWannaShout: A mermaid's voice can blow your eardrums or your car away. It is possessed by all female mermaids, apparently (Lunar does it often, and both Akeno and Ren do it in the finale).

Unfortunately, Sun is also [[MafiaPrincess the daughter]] of a mermaid {{yakuza}} clan, and her [[OverprotectiveDad fiercely-overprotective father]] and several other clan members are not happy with the engagement and would rather just have him killed and be done with it. And there is also the matter of keeping it a secret that Sun is a mermaid as she starts attending his school. Then, of course, there's the matter of Sun's pint-sized bodyguard, who would like nothing better than to murder Nagasumi. Oh, and Sun's family decide it's a great idea to off some of the staff at Nagasumi's school and take their place so they can better watch Nagasumi. [[HilarityEnsues Do we really have to say it?]]

** Sun is extremely devoted to Nagasumi, to the point that she decided to follow him to Saitama and [[InnocentCohabitation live under the same roof]] as his fiancée. She was even willing to bet herself for her future husband's contest. What truly sells it is when she [[spoiler: interrupts Lunar's ShotgunWedding]] while wearing a wedding kimono and carrying a katana, which she then uses to great effect. Note that Sun, despite her YN traits, subverts it in the speaking department, at least in English. Instead of the formal speech patterns of more traditional [=YNs=] like [[Manga/AhMyGoddess Belldandy]] or [[Manga/AiYoriAoshi Aoi Sakuraba]], Sun has a more "casual" register, with contracted words and dropped final "g"s.

* BattleAura: [[https://static.tvtropes.org/pmwiki/pub/images/cit_battle_aura_seto_no.jpg Like so.]]
** [[VisualNovel/TheDevilOnGString Doesn't it remind you of a certain end of the century anime with a thug that has a mohawk?]]

* FirstKiss: Nagasumi's. You'll find out soon enough, and the anime [[RunningGag won't let you forget it]].

* GeckoEnding: The anime follows the manga with minor alterations up to Chapter 28 and then diverges wildly, with the manga carrying on with zany SliceOfLife stories involving Sun's numerous often-{{yandere}} {{Forgotten Childhood Friend}}s and the anime veering into a RescueArc where [[spoiler: Sun is abducted]], with some of the new characters from the manga being belatedly introduced in the [=OVA=]s. [[spoiler: Starting at Chapter 68, however, the manga starts to [[BroadStrokes generally follow the path of the anime's finale]].]]

* GoldenSnitch: After seeing that his beloved daughter's team is losing the school athletic competition, Sun's father announces that the final race will be worth [[{{Pun}} 333]] points.
** Which also is an IncrediblyLamePun since 3 is pronounced "san" in Japanese.
* GratuitousEnglish: Lunar's dad is a walking ''factory'' of this trope. The most memorable being: ''"Masatsu Za Human!! TERMINATE!! [[https://www.youtube.com/watch?v=bAelnLrZcNE ("Kill the Human!! TERMINATE!!") ]]

* HopelessSuitor: Pretty much any girl not named Sun, [[spoiler: although Lunar ''does'' almost succeed in roping him into a ShotgunWedding of her own]]. The class president in particular is a tragic case, as she's [[ShrinkingViolet incredibly shy]] around Nagasumi, and in episode 21 of the anime, she finally manages to write a love letter to Nagasumi. But her efforts are both sabotaged by her classmates, and later Sun's dad/Maki. While PlayedForLaughs, you can't help but feel a little sorry for her making such a fool of herself given how much courage it must've taken her to do this.
* ICanExplain: "THIS IS JUST A MISUNDERSTANDING!!!" Spoken by Nagasumi, many, many times.
** He unfortunately always rolls a natural zero in his diplomacy checks.

%%* InvoluntaryDance: Festival Dance.
* IronButtMonkey: Nagasumi for the most part. Saru fits this trope as well, being able to take various punishments from many characters (usually Nagasumi).

* LoveDodecahedron: Mawari and the Class Rep have crushes on Nagasumi, who is dating/engaged to Sun (but sometimes has to admit that Masa's lookin' kinda cool) while Lunar tries to secure him for herself due to a rivalry with Sun, who -- the entire male population of the school in general aside -- is also being pursued by Kai Mikawa, one of her childhood acquaintances, who in turn has most of the female student body swooning over him.

* LovePotion: With the side effect of every guy that sees him hating him, in episode 21.
** We even get to see what the various females' view of the "ideal man" is...except Maki's, [[{{Squick}} though this is probably for the best]].
*** [[PsychoLesbian Assuming she even]] ''[[PsychoLesbian likes]]'' [[PsychoLesbian men]].

* MagicMusic: Presumably all mermaids can do this but we only see Sun, her mom, and Lunar.

* NewTransferStudent: Sun, Lunar, Kai, Akeno...and that's not counting Sun's family replacing half the school staff.
** The cast starts {{lampshading}} this after the first few transfers.

* NotWhatItLooksLike: Early on, Nagasumi tries to dry Sun's legs using a rather compromising position.
** Later, an even worse case of this almost leads to a ShotgunWedding with Lunar.

** An almost ''literal'' example, when [[TerminatorImpersonator Lunar's dad]] walks in on her naked from the waist down and Nagasumi rubbing her behind with a towel,[[note]] ...having just been drying her off after she'd been splashed with water.[[/note]] Lunar takes advantage of the [[NotWhatItLooksLike ensuing misunderstanding]] to try to steal Nagasumi away from Sun. Sun blames herself and becomes depressed, and Lunar goes to clear up the misunderstanding but ends up gloating about stealing Nagasumi instead -- while internally berating herself for doing so. Nagasumi almost goes through with it, but [[SpeakNowOrForeverHoldYourPeace Sun crashes the party]] wearing a wedding kimono and {{sarashi}}, carrying a katana, and declaring her intent to take Nagasumi back and defect from the Seto gang to prevent a war from breaking out.

* {{Yakuza}}: ''Mermaid'' yakuza, at that.

* {{Yandere}}: Scary, scary Lunar and Maki.
** Saturn from the manga and second OVA makes Lunar look positively harmless.

* InnocentCohabitation: Sun decided to move to her fiancé's house, which upset her father to no end.

* OverprotectiveDad: Sun's father takes this to a [[strike: borderline]] '''truly''' ''psychotic'' level. Lunar's father is more stoic, but just as dangerous.

* InvoluntaryDance: Festival Dance.
* InvoluntaryShapeshifting: Young mermaids' legs automatically revert back to tails when they get wet, and revert back when they're dried off. According to Akeno, it's like trying to hold in a sneeze.

* TransformationExhilaration: Young mermaids grow tails when they get wet. Resisting the transformation results in a tickling sensation, which is pushed all the way into the realms of FantasticArousal in one episode when two mermaids practice [[IsThatWhatTheyreCallingItNow endurance training]].

* CryCute: Most of the girls, particularly Sun and Lunar.

** An almost ''literal'' example, when [[TerminatorImpersonator Lunar's dad]] walks in on her naked from the waist down and Nagasumi rubbing her behind with a towel,[[note]] ...having just been drying her off after she'd been splashed with water.[[/note]] Lunar takes advantage of the [[NotWhatItLooksLike ensuing misunderstanding]] to try to steal Nagasumi away from Sun. Sun blames herself and becomes depressed, and Lunar goes the clear up the misunderstanding but ends up gloating about stealing Nagasumi instead -- while internally berating herself for doing so. Nagasumi almost goes through with it, but [[SpeakNowOrForeverHoldYourPeace Sun crashes the party]] wearing a wedding kimono and {{sarashi}}, carrying a katana, and declaring her intent to take Nagasumi back and defect from the Seto gang to prevent a war from breaking out.

** An almost ''literal'' example, when [[TerminatorImpersonator Lunar's dad]] walks in on her naked from the waist down and Nagasumi rubbing her behind with a towel,[[note]] ...having just been drying her off after she'd been splashed with water.[[/note]] Lunar takes advantage of the [[NotWhatItLooksLike ensuing misunderstanding]] to try to steal Nagasumi away from Sun.

* VillainProtagonist: See CardCarryingVillain above; it's REALLY easy to forget that these are {{Yakuza}} that we are laughing with.

* HeterosexualLifePartners: Kai and Saru, [[UpToEleven to the extreme.]]