[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/Denpa_Onna_to_Seishun_Otoko_light_novel_volume_1_cover_4194.jpg]]
[[caption-width-right:300:Shown: A [[TheCutie cute]] [[TrademarkFavoriteFood pizza lover.]] Not shown: Her [[SecurityBlanket safety futon wrapper.]]]]

16-year-old Makoto Niwa [[GenreSavvy thinks he's about to live the dream life]]: with his parents [[ParentalAbandonment conveniently away on business]], he moves out to the big city to live with his 39-year-old aunt, [[ManChild Meme Touwa]]. Cue dreams of having the house all to himself, surrounded by pretty city girls and living out a normal adolescent life.

All that comes to a screeching halt the moment he steps into Meme's home to find a young girl -- Meme's hitherto unknown daughter and his cousin, Erio -- wrapped in a futon lying on the front step. Worse than that, she [[TechnoBabble speaks strangely]]. And thinks she's an alien.

''Denpa Onna to Seishun Otoko'' is a series of light novels written by Hitoma Imura, which follow Makoto as he finds out more about his confused cousin and her strange beliefs about how their entire lives are nothing but a huge alien experiment.

An anime adaptation by Creator/StudioShaft began airing in April 2011.

----
!!Tropes in ''Denpa Onna to Seishun Otoko'' include:

* AbhorrentAdmirer: Meme, to Makoto. Consequently, all of the things she does that would normally give Makoto pluses in his adolescence point tallies are tallied as minuses
* AccidentalMisnaming: Ryuuko, due to AlternateCharacterReading she was given the name by a student in her first year [[spoiler:(read: Erio)]] that quickly spread to everyone else.
* {{Baseball Episode}}: Not so much an episode, but Makoto and Erio join an amateur baseball team in later episodes. Episode 12, dealing with the fateful baseball game that will determine which side of the town will host the summer festival, plays this trope the straightest.
* BishieSparkle: Elliot, Meme ''and'' Erio have glittering hair.
* BlandNameProduct: Amongst other examples, Episode 11 features a "[[SuperFamicom Kingindo Superior Computer]]" with games such as "[[Videogame/EarthBound Father 2]]" and "[[VideoGame/SuperMarioKart Super Maruo Kart]]."
* BrokenBird: [[spoiler:Erio has shades of this. Just disappeared one day, showed up half a year later with nary a memory as to what happened during that time, retreated into her fond memories of space, tried to do an ET bike moment, broke her leg during that same moment, and retreated even deeper into her space fantasies, as well as a futon.]]
* [[BumblingDad Bumbling Mom]]: Meme ''does'' love her little girl, and the only time she's ever been shown to be serious was when she's thinking about Erio. But that doesn't stop her from showing she has absolutely '''no''' idea on how to be a parent. At best, she's more like an emotionally stunted older sister. At worst, [[AbusiveMom she's willing to fling her daughter around the house]].
* BystanderSyndrome: Most people's reaction to Erio, including her ''mother''. Makoto is the [[OnlySaneMan exception]].
* CannotSpitItOut: Ryuuko towards Makoto. At times she seems like she wants to, but then some MomentKiller happens or she goes into ClingyJealousGirl mode.
** Averted with Erio towards Makoto, although whether it's a romantic interest or just her being comfortable around him, due to her largely being a [[LonersAreFreaks loner]] up until he shows up.
* CatchPhrase: My Name Is Ryuuko. Becomes a RunningGag throughout the series.
* CatSmile: Ryuuko displays one from time to time.
* ChristmasCake: Meme. She even makes a literal joke about it when Makoto comes home from the hospital, leaving a note that there's cake in the fridge to celebrate his discharge, and it's close to expiry date, so he needs to eat it quick. Guess what he sees when he opens the door...
* {{Cloudcuckoolander}}: Mother and daughter alike are pretty messed up in their heads.
** All the girls Makoto meets could technically qualify.
** Heck, in a different show, even OnlySaneMan Makoto could possibly qualify as one--his inner monologues and obsession with "adolescence points" show that he's not particularly normal himself.
* CloudcuckoolandersMinder: Makoto for Erio
* CovertPervert: Ryuuko tends to overthink situations with Makoto. Doesn't help that Maekawa likes to give misleading dialogue, such as doing ThisAndThat, but actually referring to playing video games and just chatting.
* CuteButCacophonic: Don't let Ryuuko cheer for you unless she's standing a good 20 or so feet away. Her "cheering" of Makoto involves her screaming into his ear at the top of her lungs
* CryCute: [[spoiler:Erio near the end of episode 3, after a reality check forced her to admit that she cannot fly.]]
* TheDanza: Hanazawa, a minor character on the shopping district baseball team, is voiced by Creator/KanaHanazawa.
* DeadpanSnarker: Makoto
* DisappearedDad: Elliot, Erio's father, who was apparently Scottish. Meme and him apparently have different world views, and "wouldn't do well living together."
* DoItYourselfThemeTune: Newcomer seiyuu Asuka Oogame (Erio) sings the opening theme.
* DontExplainTheJoke: Maekawa visits Makoto in the hospital dressed as an eggplant, explaining that she was trying to make a pun on "nurse" (the Japanese word for eggplant is "nasu"). Makoto responds by quoting this trope almost exactly.
* DrivingQuestion: Just what happened to Erio to make her lose a year's worth of memories?
* ExpressiveHair: Erio's seems to glitter when she's happy.
* {{Expy}}: Meme looks like [[LightNovel/ToraDora a certain baka-chihuahua]].
** And Makoto's basically a [[DeadpanSnarker snarkier]] version of [[DuRaRaRa Mikado]].
* FirstPersonSmartass: As per Creator/StudioShaft tradition, Makoto frequently converses with himself.
* FlyingSaucer: A common motif of the series, and sightings are apparently common in Makoto's new hometown.
* GenreSavvy: Makoto sees his move as an opportunity to pursue romance.
** Makoto even tallies up the plot points of the series. The next episode teaser includes his tally sheet for the episode.
** In the 3rd episode, [[spoiler:Erio does the tally for him, representing the breakthrough in their relationship. "I Cannot Fly" is worth the most points out of the day's events, and they say it in unison.]]
** In episode 8, Meme and Erio both total up their various scores, completely forgetting Makoto's until the end. His was +2 by the way.
* GirlishPigtails: Meme had some when she was a little girl. They help make her (more) adorable. Erio follows suit in some later appearances.
* GratuitousEnglish: Multiple times, often by Meme as a way to avoid explaining something she said. In Episode 2, Makoto asks for directions when taking Erio on the bike, she responds with "Left Side", "Reright", and eventually "Sunny side up". She also dumbs down her TechnoBabble to explain to Makoto that "I can fly". [[spoiler:During the ending credits of Episode 3, her tallying up the event when Makoto forces her to face the fact that she actually can't is "I can't fly."]]
** Maekawa responds to Ryuuko saying that she and Makoto can't go to the beach together with "Why?"
** There's also Tamura-san's "CATAUW MUTILASHION!" and Yashiro's "HELLO AND GOODBYE!"
** In episode 11, while Ryuuko talks to Makoto over the phone, Erio bursts into his room to take him out for some stargazing. Ryuuko [[ClingyJealousGirl gets annoyed]] by the sudden interruption, and says "Be quiet", followed by "Attention please."
* HairAntennae: Erio. They even have a [[ExpressiveHair life of their own.]]
** Also Meme.
* HaremGenre: Makoto seems right on track to get a harem. [[GenreSavvy After all, this is how he thinks his dream life in the city could become]].
* HeIsNotMyBoyfriend: Mikki teases Ryuuko about this in episode 11 when Makoto shows up to watch her game. She tries to deny it, but her friend sees right through it and teases her.
* HelloNurse: Inverted. Meme keeps trying to attract Makoto's attention, but it annoys him out more than anything else.
* HugeSchoolgirl[=/=]StatuesqueStunner: Maekawa stands 179.9cm (around 6 feet). That's very tall for a woman in ''general'', more so for a Japanese girl.
* IllGirl: Parodied in Maekawa's introduction. She isn't sick, just hilariously unfit such that she gets dizzy if ''she raises her hands above her head for a few seconds''. Makoto is enthralled.
-->'''Makoto:''' "So dignified, yet so weak!"
* ImagineSpot: Makoto has a lot of these. Hilariously played with during Episode 4 when he's in hospital and imagines seeing Ryuuko, then Maekawa appears under the bedsheets of his bed, and the third person he sees is Meme. At first it seems be another imagination, only to then have him wish it were the case when Meme really does turn out to be under his sheets.
* JerkassFacade: Despite constantly ignoring and abusing Erio, Meme does care about her little girl. Her less-than-motherly treatment stems from the fact that Erio prefers solitude, and Meme doesn't really remember [[ReallyGetsAround how Erio came to be her daughter]].
* KissingCousins: Makoto finds Erio attractive, is unable to stop trying to help her despite Meme telling him otherwise, and is easily reminded of her even when socializing with other girls. Whether or not this will develop into a romance remains to be seen.
** As of episode 4, Erio seems to have started reciprocating Makoto's interest in her, and in episode 5 she outright tells him that she ''likes'' him. Once again, it's currently ambiguous as to whether this is a romantic attraction or just a friendly one.
* LiesToChildren: Makoto comes to realize that ruining Erio's dreams of aliens is not much better than ruining a child's dreams of Santa Claus. [[spoiler:He even (unintentionally) made Erio cry.]]
* MaleGaze: Quite a bit of it with Erio, especially during the ending credits.
* MaybeMagicMaybeMundane: It is established that Erio is not really an alien pretty early on, especially after the "I can't fly" stunt. Yashiro, on the other hand, falls into this trope especially in episode 13, where [[spoiler: she may or may not have called down a meteor in order to demonstrate her powers]]
* MeaningfulName: Erio Touwa's full name can be spelled out as E.T. No wonder she thinks she's an alien. On top of that, it turns out that her father's name was [[ShoutOut ''Elliot'']].
* {{Moe}}: InUniverse application by Meme when referring to herself.
** [[GenreSavvy Makoto]] also questions whether Ryuuko/[[AccidentalMisnaming Ryuushi]] is also deliberately invoking the term to describe herself.
* NamesToKnowInAnime
** MiyuIrino: Makoto Niwa (Irino's first big Shaft role)
** Creator/AiNonaka: Meme Touwa (that may explain why Meme is one of the cutest anime moms to date)
** Creator/EmiriKatou: Ryuuko "[[AccidentalMisnaming Ryuushi]]" Mifune (Katou's big break from her nigh-[[RealLife real-life]]-[[HeroicBSOD breakdown]]-inducing [[PlayingAgainstType casting as]] [[FauxAffablyEvil the infamous]] [[Anime/PuellaMagiMadokaMagica Kyubey]])
** Creator/YukaIguchi: Yashiro Hoshimiya (It's [[ToAruMajutsuNoIndex Index]]! Except in a spacesuit! And claims she's an esper!)
** Creator/KanaHanazawa: [[TheDanza Hanazawa]] (heh... [[SarcasmMode thank you]], [[TheNicknamer Maekawa]])
* NewTransferStudent: One subverted case: Makoto ''was'' a new kid in town. The story is set in his second year there. [[OnlyKnownByTheirNickname Strictly]] or [[InSeriesNickname otherwise]], everyone still refers to him as "Tenkousei", the Japanese name for this trope.
* TheNicknamer: Maekawa seems to like giving people names that she's very comfortable with. To date, Ryuuko is "Ryuushi" [[spoiler:(courtesy of Erio)]], Makoto is "[[NewTransferStudent Tenkousei]]" and that minor baseball player character is "[[Creator/KanaHanazawa Hana]][[TheDanza zawa]]".
* NoSenseOfPersonalSpace: Erio and Meme tend to get a bit too close to Makoto at times.
* NotTheFallThatKillsYou: Erio fell off a bridge when attempting to recreate the famous "ET Flying Bike" scene, breaking her leg in the process. [[spoiler:Makoto broke his arm when they did the same thing together.]]
* OffModel: Episode 4 is the first really bad episode. When the girls visit [[spoiler:Makoto in the hospital]], their faces rather blatantly distort. (In that scene, the same carelessness was applied to [[http://20gp.ovh.net/~example/denpa_shoes/ their feet]].)
* OhCrap: Makoto is usually stoically skeptical on the topic of the supernatural but he looks positively a second away from having a heart attack in episode 13 when [[spoiler:Hoshimiya's claims of giving a demonstration about her powers is followed by a freaking '''METEORITE''' falling down from space onto the exact spot he was standing in not a minute before]]. Even more so once he [[FridgeHorror realizes]] [[spoiler:her instructions about him taking a specified number of steps in a specified direction actually saved him from being hit dead-on by it]].
* OlderThanTheyLook: Meme is 39 years old. She looks -- [[ManChild and acts]] -- like she's in her late teens.
** She turns 40 in episode 5. That's enough to make her copy Erio.
* OneDialogueTwoConversations: In episode 11, Erio bursts into Makoto's room while he's chatting with Ryuuko. Some things are said, and Ryuuko overhears that he'll go out with her, meaning that he's dating his cousin. However, Makoto was just telling Erio that he'd go outside to go stargazing, but Ryuuko hangs up before he can explain.
* ParentalAbandonment: Makoto's parents are away on business, so he has to live with his aunt and cousin.
* POVBoyPosterGirl
* RagtagBunchOfMisfits: The shopping district baseball team which contains at one point or another pretty much all of the weirdos on the show except Yashiro, who plays for the other team.
* RankInflation: In Episode 7, the youth point tally at the end[[note]]which normally maxes out at 5 points per "event"[[/note]] gives "[[ModestyTowel seeing Ryuushi and Maekawa in towels]]" [[ReadingsAreOffTheScale 5-100-1000000 points]] until it ends up at 3 stars, which Makoto vocalizes with a sort of moaning sound.
* RapunzelHair: Erio, due to not having cut it in years.
** She gets it [[ImportantHaircut cut]] in episode 5. While it didn't make her hair any shorter, nevertheless she looks much neater after that.
** Also Meme.
* ReallyGetsAround: It's hinted that this is how Meme got Erio. At the very least, she said she figured out who her father was after ''working it out on a calculator''.
** Episode 8 seems to have debunked this, as it shows that Meme had fallen in love with Elliot many years before Erio was born.
* RedEyesTakeWarning: Ryuuko, and unlike [[Creator/EmiriKatou her seiyuu's]] [[Anime/PuellaMagiMadokaMagica previous role]] there is nothing to worry about, probably except [[GenkiGirl her hyperactiveness]].
* SayingSoundEffectsOutLoud: Erio does this on occasion.
** Also Ryuuko while exchanging numbers which Makoto.
* SceneryPorn: Every now and then we are treated to a scene that is difficult to believe isn't a photograph.
* SecurityBlanket: Erio's futon, which she wears under the justification that she cannot interact with the humans she's observing. In episode 2, she gets it swapped out for a smaller one that she cannot completely hide in. It's adorable.
** Even after she comes to grips with reality, she still finds being wrapped in one very calming.
** [[spoiler:Meme also uses the futon, even as she tries to come to grips with the harsh truth that she just turned forty.]]
* SheIsNotMyGirlfriend: Gender-flipped -- Ryuuko's teammates constantly tease her about Makoto being her boyfriend, which she vehemently denies. Interestingly, he doesn't seem to be entirely against the idea...
* ShrinkingViolet: Erio comes off as one once she ditches her futon. Meme's teasing doesn't help.
* ShoutOut: Meme's dialogue is full of anime memes and references to video games. For example, she [[http://earthboundcentral.com/2011/04/more-mother-references-in-anime/ quotes the intro]] to ''VideoGame/{{MOTHER|1}}'' multiple times when having dinner with Makoto. (Later, in Episode 6, it's shown that Erio has a Mr. Saturn plushie in her room, continuing the MOTHER references.)
** The ending has one for E.T. [[spoiler:Erio ATTEMPTED to do the same. It... didn't work out, and is now the reason she wears that futon.]]
** Makoto saying he'll [[ToAruMajutsuNoIndex destroy Erio's illusions]] before deciding he's not {{Hot Blood}}ed enough. [[spoiler:He does it anyway.]]
** [[http://i.imgur.com/2597z.png This]] in episode 5: Meme gives Makoto and Erio a map of how to get to a certain hair salon to get Erio's hair cut. Apparently Meme is a bit of a fan of StreetFighter.
** "Stop, stop, stop, stop! [[TheGirlWhoLeaptThroughTime I'm a Makoto, too!]] Stop it! [[TimeStandsStill Time, stop!]]"
** [[{{Eureka 7}} "IIIIIIII KYAAAAAN'T FRYYYYYYYYYY!"]]
** "How much of that was you acting cold? "99.7% real, 0.3% acting." "What about me?" "About FiveCentimetersPerSecond!"
** The last episode makes two more references to FiveCentimetersPerSecond. The episode's title is "0.00000000198 Centimeters Per Second", and Makoto also says the words "One more time, one more chance", which is the title of the theme song of the aforementioned film. Another possible shout out is, perhaps, this series' protagonist sharing his first name with the director of FiveCentimetersPerSecond, Makoto Shinkai.
** Erio's bizarre, Pokémon-like noises whilst in the futon are a shout out to ''[[Anime/FullMetalPanicFumoffu Full Metal Panic? Fumoffu]]''.
** "Do you think I'd let a runaway who eats off fields in here?" Guess to whom this line is addressed to. Then think of [[ToAruMajutsuNoIndex a certain blue-haired character in a white nun's habit]] and remember how much of a glutton she is.
** Episode 11 references the Yiddish folk song "Donna donna" about a calf being taken to slaughter. Difficult to say where this one comes from, since it's appeared in numerous anime, including Revolutionary Girl Utena and Ghost in the Shell: SAC.
** Another one in Episode 11 when Makoto and Maekawa are playing a game on the television. It's VideoGame/MarioKart with different colors.
** You can also see a [[{{VideoGame/Earthbound}} MOTHER 2]]- erm, sorry, "FATHER 2" cartridge.
** In episode 10, after Makoto and Yashiro jump into the pool, she says "Take this, [[DragonBall Kamehamaha!]]"
** At the end of volume 3, Yashiro [[Videogame/{{Earthbound}} tries PK Starstorm]] on Makoto. [[spoiler:The ensuing meteorite leaves quite a mark on him.]]
** Near the end of the 13th episode, there is a shout out to Evangelion - Makoto talks with himself by asking himself questions and aswering them, in two distinctly different voices. He also sits alone on a chair in the middle of a classroom. Of course, he's just imagining that.
* SocialServicesDoesNotExist: If it did here, Erio would've been taken away a long time ago and given some psychiatric examinations.
* SoftWater: Subverted. Makoto hits a lake from very high up and seems fine, but in the next episode it's almost immediately revealed that he actually broke his arm in the process. Erio was apparently okay, though.
* StrongFamilyResemblance: Erio looks exactly like her mother except that her [[CurtainsMatchTheWindow hair and eyes]] are light blue compared to her mother's dark blue.
* StuffedInTheFridge: Meme does this to ''herself'' as part of an elaborate gag about how she's a ChristmasCake
* SuperDeformed: Happens on a fairly regular basis.
* SurrealThemeTune: This is a Creator/StudioShaft anime, after all.
* ThereAreNoTherapists: Rather than get her professional help for what appears to be a dangerous delusion (she even jumped off a bridge!), Meme allows her daughter to effectively shut herself up in her room and fall further into said dementia. Tragically, this is very much TruthInTelevision.
* TinyGuyHugeGirl: Makoto to Maekawa.
* UnmovingPlaid: Erio's futon. Also, Meme's pants in Episode 3.
* UnPerson: Meme initially treats her daughter Erio like this, seemingly avoiding any kind of meaningful interaction, and tries to get Makoto to do the same, but thankfully this trope falls out of play as the series goes on, and they start spending some quality time together.
* UnwantedHarem: Makoto is often caught juggling his attention between Erio and Ryuuko, thanks to the unspoken rivalry between them. Maekawa, surprisingly, is more laid back about the whole thing.
** In the last couple of episodes, [[spoiler:Maekawa starts to take it up a notch. She invites Makoto to her house, cooks a meal for him, and they generally spend some quality time together. She invites him back, and he seems to appreciate it...]]
* UnresolvedSexualTension: A lot between Makoto and Ryuuko/[[AccidentalMisnaming Ryuushi]]
* WhamLine: Meme gives one to Makoto in episode 3, when she tells him if he's only hanging out with Erio because she's pretty, he should stop right now. It comes as a complete shock to him because its probably the first time she speaks in a serious tone to him. Despite that, he continues to help Erio out as much as he can.
* WhatTheHellHero: Yashiro seems to invoke this trope on Makoto late in the season. Then some really coincidental stuff happens in Episode 13 to make him start questioning if all the stuff he did towards breaking Erio out of her "alien" shell was really a good thing or not.
* [[YouGottaHaveBlueHair You Gotta Have (Silvery) Blue Hair]]: Erio. Bonus points for it ''glittering.''
** Meme on the other hand just has a darker shade.
** Erio got it from her dad, sparkles included. Though Meme shows that she can sparkle too in episode 8.
* {{Yandere}}: PlayedForLaughs with Ryuuko on at least two occasions.
** The first time is when she and Maekawa visit Makoto's house, and he's seen petting Erio's head as Ryuuko is making something for dinner. He looks over and sees Ryuuko with a creepy smile, and as he raises and lowers his hand from Erio's head, she does the same with the knife she's holding.
** The second time is during episode 13 while Makoto and Ryuuko are at the festival. After she finds out he's going to be meeting his cousin Erio, she develops a strange look in her face, and tells him that he'd better pay her back a hundred times for ditching her. It creeps him out initially, but then she runs off shortly afterwards, claiming that it was just all an act.
* ZettaiRyouiki: Ryuuko's outfit in episode 6.
----