History Manga / TheDemonGirlNextDoor

* FantasticRacism: In the war between magical girls and demons, there is very little gray. Demons are {{Harmless Villain}}s or {{Non-Malicious Monster}}s at their absolute worst and almost exclusively victims. Magical girls and their navigators can make their own decisions and don't ''need'' to be evil, but VanHelsingHateCrimes are technically the entire purpose for their existence. The PowersThatBe decided that all non-mundane entities in this world are a cosmic mistake in the world's creation and wants that problem fixed via [[SealedBadassInACan sealing]] or outright genocide.

** In chapter 19 (and its anime equivalent episode 9), Lilith suggests Yuko bring the former's statue to the latter's test so that Lilith can "stream" Yuko answers to a history test. When Lilith says this, the logo "Gozenso[[note]]Ancestor[[/note]] Answers" appears above her, in a form parodying Website/{{Yahoo}} Answers.

* ChainsawGood: {{Defied|Trope}}. In chapter 85, Shamiko turns the Whatever Staff into a chainsaw to trim Lilith's horn. When Lilith says she should make that her default weapon, Shamiko declines, saying she feels like it wasn't meant to be used on people.

** {{Lampshaded}} when everyone needs to conduct a ritual within one night. Sion attempts to explain that it'd be impossible within that time frame because the required ingredients aren't on hand and are difficult to acquire on such short notice, only for Yuko to reveal that either she knows someone who can get it for them or has it already.

* {{Familiar}}: Magical Girls get animal navigators that act as their familiars. Momo has her cat Metako [[spoiler:(who originally belonged to Sakura)]], and Mikan has a lethally toxic [[https://en.wikipedia.org/wiki/Golden_poison_frog golden dart frog]] named Michael. [[spoiler: Honyu has a lionhead goldfish named Zikiel.]]
* FantasticFragility: Three ways have been mentioned to defeat the PerceptionFilter effects of the barriers. One, directly attacking the source of the barrier with magic from beyond its effect range can temporarily disable it. Two, someone not affected by it can just physically convey a MagicalGirl into a protected place. Three, if someone under a barrier's protection [[MustBeInvited invites someone else in]], it stops working on the invited individual permanently. A barrier that has been overcome will begin to decay if someone it's supposed to be keeping out finds a way in, and spends a prolonged time in the area it should be protecting. When Yuko invited Momo to come visit her apartment, Momo was immediately able to follow her home (invoking the third method). [[spoiler: The barrier on the Yoshidas' apartment door had seriously degraded by about 60% after ten years because of Yuko carrying around Sakura's core (invoking the second method), and when Momo and Mikan moved into the adjacent apartments and became regular visitors, the remaining 40% or so of the barrier on their door [[NiceJobBreakingItHero had almost entirely decayed away after about three months]].]]

* GenreSavvy: In chapter 82, Ryou is confronting Ogura Sion about her true identity when Lico abruptly interrupts them saying she's "found something amazing". Ryou ignores her and returns to grilling Sion.
--> '''Ryou''': "Ryou has seen this in books. When an important conversation gets interrupted due to intrusions like this, the plot gets foggy and allows things to be gotten away with. Ryou has seen this in a lot of books."

--> '''Ryou''': "''We don't need that sort of stuff, please at least reveal your identity!''"
* GilliganCut: In chapter 43, after Momo loses her opportunity to pet some tiger cubs, Lico offers to let Momo cuddle with her (in her natural fox form, that is). Momo angrily declares, "'''No, thank you'''." The very next panel is a sour-faced Momo cuddling with fox Lico, muttering, "[[ArcWords Don't think this means you won.]]"

* HanlonsRazor: [[spoiler: Ugallu's]] summoning is a prime example of the Grey's Law corolary. [[spoiler: Ugallu was summoned for the task of "protecting Mikan". However, the summoning was shoddily done and Ugallu's vessel broke down, forcing the familiar's spirit to take residence within Mikan. She still acted to complete her original task; however, with no way of telling what was going on outside, she decided that the best way to "protect Mikan" would be to lash out at everything around Mikan whenever her heart shakes.]]

** In Volume 1, she enters Momo's dream as a trial run for her power, and ends up accidentally cleaning up Momo's lonelines and trauma.

* OneDialogueTwoConversations: In episode 11, Momo tells Yuko inside her dream that she needs to grill her mother. While Yuko meant ask her questions about her father's whereabouts, Yuko instead thinks that Momo meant grill her in the sense of literally barbecuing her. Once Momo arrives at Yuko's apartment, they continue their misunderstanding, until Yuko's mother, who heard the entire thing, ends up clearing it up. She then fills the girls in on what happened in the past, such as Yuko's frail health, her missing husband, and Momo's missing sister.

* RelaxOVision: Momo removing the seal she placed on the Ancestatue that stops Lilith switching with Shamiko with a drill gets a picture of tulips and windmills over it, along with a message to please enjoy the picture.

** Ito stated the succubi designs were inspired by ''VideoGame/RagnarokOnline'' and the Ancestatue was a cute-ified version of the false idol from ''VideoGame/DragonQuestII'' crossed with a Haniwa statue.

** Lilith somehow manages to talk Yuko's teacher into letting her take the same set of final exams as the rest of the class. She gets the third highest score out of everyone in Yuko and Momo's grade. Apparently she's learned quite a few things over the last 5,000 years.

---> '''Yuko:''' I grew horns and have to find and murderize a magical girl to undo the family seal. [...] [[LampshadeHanging Isn't everyone too non-chalant about what I'm saying?]]

** In Chapter 48, Mikan transfers to Yuko's class, and during the introduction her class teacher mentions her status as a MagicalGirl and her [[TheJinx curse]]. Neither of these elicit any response--her classmates are more interested in her mundane life.
* VanHelsingHateCrimes: Not all Light Clan members care whether a demon is actually evil or not and will hunt them down for points. It is also worth noting that demons in this setting don't seem to be any more intrinsicly evil than anybody else, making their persecution little more than FantasticRacism.

** Chapter 76: We finally see Momo's DarkAndTroubledPast and the manga does '''not''' [[UnexpectedlyDarkEpisode pull punches]]. [[spoiler:Momo accidently gave Suika the information she needed to murder many of the peaceful demons in living in town. When Momo and Metako tried to stop her, Suika used a wish card to break Metako's mind - which is why she only says "The time hath come!" - and [[WouldHurtAChild maimed Momo]], causing the scars on her side. While she was ultimately defeated, her final threat to Yuko establishes her as the series' first real villain.]]
** Chapter 77: Yuko discovers chapter 76 was only a ''part'' of what Momo went through, as she gets a look [[spoiler:at her first meeting with Sakura as a Ukrainian ChildSoldier, and learns Sakura asked Joshua to give Momo FakeMemories of growing up in a normal orphanage. As a result, Yuko commits herself to being a demon who can protect everything she cares about - herself, the town, Momo's smile - and improves her capabilities with the Whatever Staff, finally managing to turn it into a cheat weapon in the waking world, the Staff of Recovery.]]

* WritingForTheTrade: It seems like the author clearly knows that most volumes contain 13 chapters (volume 5 being the exception, with 12), so the plot-heavy content is always arranged to come towards the end of the volume--especially on the ''second to last'' chapter of each volume (or the 13n-1th chapter), which nearly always contains important plot twists.

** In Volume 6, Momo lets Yuko enter her own memories to learn how Momo "saved the world" six years ago.

* RiddlingSphinx: In chapter 83, when Lico, Ryou, and Ogura find a hole in Momo's kitchen, they descend into it and find a sphinx guarding the space. It asks them the RiddleOfTheSphinx, which Ryou aces due to being well-read. ''Then'' it asks her for an essay on the roots of Egyptian agriculture, making Ryou break out in cold sweat. Fortunately it recognzies Ogura, so Ryou doesn't have to answer.

* SuddenVideoGameMoment: In chapter 85, when Momo explains that she suspects the Whatever Staff is draining Shamiko's health points instead of her magic points, it's illustrated via an RPG stat screen.

* GirlsAreReallyScaredOfHorrorMovies: Zigzagged. Mikan drags Yuko out to a horror movie; she wants to practice subjecting herself to something scary as training to keep her feelings in check, and doesn't want to go by herself. Mikan is a nervous wreck for half the movie...and unconscious for the other half. Yuko enjoys the movie, [[RootingForTheEmpire roots for the zombies]], and cries at the end when the heroes win.[[invoked]]
--> '''Mikan:''' Wait, why are you crying? What's wrong? Did you hurt yourself? I don't think it's possible for my curse to attack your stomach or anything!
--> '''Yuko:''' That's not it... I'm just so touched... All of the zombies and ghosts, even though their guts were hanging out, they really tried their hardest to overcome the ridiculous strength of the heroes...
--> '''Mikan:''' That was the side you were sympathizing with?!

** The volume 5 preview/Season 2 Episide 7 "recap" is based on fellow ''Kirara'' manga series ''Manga/SchoolLive'', complete with an orange zombie dog. The anime throws in references to ''ComicBook/TheWalkingDead'' and ''Film/NightOfTheLivingDead''.

At that point, her mother reveals the Yoshida household comes from a line of demons. But millennia of defeat at the hands of the Light Clan's warrior-priestesses, known in the modern age as "[[MagicalGirl magical girls]]", have stripped the demons of their demonic appearance, powers, and prosperity, while cursing them to scrape by on only 40,000 yen a month. Now that Yuko has awakened to her demonic nature, her mother dubs her "Shadow Mistress Yuko" -- Shamiko for short -- and tasks her with defeating their mortal enemies and breaking their family's curse so they can enjoy the kind of fine dining you only get at family restaurants.

* SuccubiAndIncubi: If the {{Stripperiffic}} outfits and DreamWalker powers didn't clue you in, Lilith confirms that she and Yuko are succubi, though they're only horny [[HornedHumanoid in the literal sense.]]

At that point, her mother reveals the Yoshida household comes from a line of demons. But millennia of defeat at the hands of the Light Clan's warrior-priestesses, known in the modern age as "[[MagicalGirl magical girls]]", have stripped the demons of their demonic appearance, powers, and prosperity, while cursing them to scrape by on only 40,000 yen a month. Now that Yuko has awakened to her demonic nature, her mother tasks her with defeating their mortal enemies and breaking their family's curse so they can enjoy the kind of fine dining you only get at family restaurants.