This is a fetish for Kumagawa of Medaka Box, to the point that he eventually names his clique in the school the Naked Apron Alliance, and continuously makes wagers where one or more of the losing females will have to serve him in this state. When Kumagawa (a.k.a Naked Apron-senpai) won, nay, DOMINATED a popularity poll, to the point that he received more votes than 2nd, 3rd, and 4th place combined, beating even the main characters, he finally got his wish.
Ditto for a character from Nagasarete Airantou. Having lived on an island her entire life without ever having met a male, everything she's learned about inter-gender relationships was from note pornographic books and magazines that washed up on shore.
"But it says in this magazine that you don't wear anything under the apron when serving dinner..." "Don't listen to that kind of magazine!"
In one chapter of the manga, a mirror image of girl-type Ranma come-to-life tries to seduce the original Ranma wearing this outfit. Nabiki hangs a lampshade on the trope and its popularity in Japan at this occasion.
Ukyō, one of Ranma's suitors, wears it at the beginning of the second Ranma ½Non-Serial Movie (subtitled Nihao My Concubine in the U.S.). Partly justified in that she is a cook by profession, she was cooking at the time, and she was wearing a bikini-bottom underneath — they were at the beach.
In Sakura Diaries, Urara uses this outfit several times as a method to try to seduce her cousin Touma, with little success.
In chapter 53 of The Wallflower manga, Sunako, of all people, does this when suffering from a strange delusion: she was so humiliated that she ended up buck naked on top of Kyohei (due to a cursed gem that made her act like an exhibitionist — long story) that she forcibly blocked it out of her mind. Unfortunately as a side effect, when she bathes the next day, she blocks out the fact that she's naked afterwards, and hallucinates that she's instead already dressed. Seconds later, she's wandering around the house in Hadaka Apron, making breakfast for the guys. The four Bishōnen who share the house with her can't believe it, either, and Kyohei has to chase her around school keeping her safe — in her mind, she's already wearing her school uniform under the apron, in reality, she just flashed her roommates and was a few minutes away from streaking the entire school.
One episode has Lala wearing this when preparing to make a meal for Rito. When Rito tells her she's supposed to wear the apron over clothes, she adds a bikini bottom. She also does in a recent chapter of the manga, saying her friends told her boys like it.
And again in one of the OVAs, where Rito actually takes an interest. And for the manga, Rito accidently forces her into one a second time when he takes over Peke.
In the manga, when Lovable Sex Maniac Fukuyama is giving cooking lessons, he does one of his trademark Instant Cosplay Surprise to put Kirie, Koyomi and Miharu in aprons, though he let them keep their underwear (at first). When Lethal Chef Kirie proves still resistant to his teaching, he strips her nude save for the apron, under the pretext she needs her full freedom of movement. This ends up as a Congruent Memory situation: Kirie learns to cook properly, but can do so only when otherwise naked. (Her Home Economics teacher is not amused.)
Siesta, the Meido from Zero No Tsukaima, uses this in one episode to attract main character Saito. Works really well.
Chi of Chobits is sort of naive about this and sort of not—she picked up the behavior from one of Hideki's hentai manga, but she doesn't understand anything about it other than that Hideki liked the manga.
Samataro's goddess mom in Kamisama Kazoku wears it at her husband's request. But then, when her son and his female angel guide Tenko come home to see her in it, she doesn't mind at all. She even proudly explains that "It's called being naked under the apron. It's a romantic gesture that really tickles mortal men's hearts."
Yoshinoya-sensei, the Cosplay Otaku Girl of Hidamari Sketch, also does this once after seeing that another class was engaged in baking. To be fair, the aprons those girls are wearing ARE rather cute. And she reassures her students that she is wearing a swimsuit underneath — it just doesn't show when viewed from the front.
The eponymous Ai of Video Girl Ai does this fairly early on in the series. After an untouched first printing, the Japanese publisher declared it scandalous and made Masakazu Katsura draw panties on her for all subsequent print runs. Because that makes it better.
Lilika does this in Burn Up! Scramble. For some reason, she takes off the underwear that was all she was wearing before. She then realizes Maya is out of salt and goes out to get some. Lilika should definitely be kept away from alcohol.
Great Teacher Onizuka: When Fuyutsuki puts him up to help him cram for his exams, Onizuka fantasizes about having her wear nothing but an apron.
In Change 123, Kosukegawa imagines Motoko as his future wife in a hadaka apron a couple of times.
In Chapter Two of the first volume of the manga version of Blue Drop, Kenzou wears an apron naked to try and seduce Shouta into having sex with her.
The movie Rebuild Of Evangelion 2.0, when Asuka attempts to prepare a meal she enacts this trope, opting only to wear a pair of Daisy Duke shorts and a bra under her apron.
In Highschool Of The Dead, Saeko Busujima wears this and panties when she has to do the cooking for the group while her clothes are drying from being cleaned for the first time since the Zombie Apocalypse started. Even funnier in a bonus chapter in the manga when Takashi's friends say that they want to see Saeko in just an apron. Even more egregious when the plot conspires to have Saeko make a Big Damn Heroes entrance riding on top of a Humvee, still in just the apron and panties, and proceeds to do battle with a zombie horde wielding a wooden sword. It's that kind of series.
In one episode of Oruchuban Ebichu, while Ebichu is cleaning house, Ebichu gets an anonymous call from a creeper asking what they're wearing (not knowing that the caller is a talking hamster), and Ebichu replies innocently, "Well, all I'm wearing is an apron, but besides that, I'm naked..."
The Goddess of Victory from Gintama ends up in one of these. Of course, this being Gintama, it was played for laughs as well as fanservice.
Goshuushou Sama Ninomiya Kun: The girls wear aprons and School Swimsuits (seen in the page's picture) in one episode while cooking dinner for Shungo's sister. Pity anyone who walks in on them because they get roped into wearing them as well. (It's implied that the mushrooms they were using in the stew were intoxicants or aphrodisiacs.)
Deconstructed along with a lot of other nudity tropes in Ano Natsu De Matteru: it's not intended as fanservice so much as an accurate depiction of what a nudist would wear while cooking.
In Is This A Zombie, Yuki's friends suggest that she serve Ayumu food to get him to fall for her. Yuki imagines herself serving him food while wearing only an apron and freaks out. Her friends wonder where she got the apron idea from, they just said to serve him food.
Io of the Amazons makes armor for Wonder Woman. She wears a leather blacksmith's apron but not a shirt (or bra) under it. She still wears pants so it's not a literal example of Naked Apron, but it's close.
In The Quiet Earth (a 1985 sci-fi film from New Zealand), Joanne serves Zac breakfast in bed, wearing an apron. When she turns to leave, we (and Zac) see that she is not wearing anything else below the waist, causing him to spill hot coffee on himself.
In Gazon Maudit (released in Britain as French Twist), Victoria Abril's character is seen wearing an apron while otherwise naked. It's a turn-on both for her husband and her butch lesbian girlfriend.
Leah Cairns' character in 88 Minutes does this at the beginning to cook for Al Pacino's character.
Done in McVicar, a mostly-true story of a prison escapee, by a woman who wants to make sure the on-the-run lead character doesn't leave the house.
Jane March's character in Color Of Night surprises Bruce Willis's character by showing up unexpectedly at his home and is cooking him dinner while wearing only an apron. It becomes very apparent when she turns around to retrieve an item from the oven and then feigns modesty by covering her rear with a potholder after she exposes her backside to him.
Pauline Lafont in Chabrol's Poulet au vinaigre.
In Bridget Jones's Diary, Bridget has a nightmare where she has to take A-level French while wearing nothing but her Domestic Science apron. When she tells it to Daniel (her boyfriend) he asks her to "run over the bit" about the apron again.
In The Otherworld, Karl wants Hope to cook him breakfast naked for his birthday. She refuses — bacon grease is hot. So he puts her in his shirt, nothing else, no panties, which barely covers her butt.
Hope: Having sex with a woman while she's cooking your breakfast? Your fantasies are showing your age.
In one of Phyllis Reynolds Naylor's Alice books, on the the main character's older brother's birthday, his girlfriend cooks him dinner while wearing only panties.
An episode of Bewitched, "Bewitched, Bothered, and Baldoni", features a statue of Venus being turned into a real woman and ending up as the Stephens' maid. Samantha hands her an apron and asks her to put it on. When Venus comes out of the bathroom, Darrin gawks and Sam is shocked.
Sam: When I said, "Put on an apron", I didn't mean just an apron! Now why don't you be a good girl and go out... (Venus starts to turn around) backwards! And we'll make sure you get a uniform to go with that apron.
The current popularity of this trope in Japan may be traced back to the aforementioned Gilgamesh Nights, wherein a pornographic actress named Yuki Hitomi would do a cooking segment wearing nothing but an apron.
In Highlander, Amanda once did this while crashing in Duncan's place. Duncan was not pleased by this. (The fans, on the other hand...)
There was a Cooking Show, Cooking Naked, who featured this with their (rotating) hosts.
The Canadian cooking show Barely Cooking did the same thing, hosted by a couple (a man and a woman) who wore nothing but an apron.
In an episode of Wings, Joe and Helen, having kicked Brian and Casey out of the house, decide that they will celebrate their newfound privacy by being "all nude, all the time" while at home. This later leads to an argument when she comes out of the kitchen wearing an apron, but nothing else. (He's covered up by a newspaper he's conveniently reading at arm's length while walking down the stairs.)
Joe: Helen, what is with that apron? I thought we agreed, all nude all the time! Helen: I am not cooking bacon naked.
Technically, it could be said that Chewbacca's wife wears one about 5 minutes into The Star Wars Holiday Special, but it's just confusing — like the rest of the show.
Played sadistically in the episode "Authority". The manager of a fast-food joint receives a phone call from a police officer, who tells him to bind, gag, and strip-search a female employee until police arrive, leaving only her apron on. He complies, then the police arrive... to arrest him for sexual assault. The call was a fake.
The episode "Sacrifice" had the detectives crash the set of a porno that seemingly involved this.
The video for Genesis' song "Jesus He Knows Me" features a woman dressed just this way during the pool scene at the bridge. She's the one working the barbecue.
The Garth Brooks song, "Somewhere other than the Night":
She was standin' in the kitchen with nothin' but her apron on And in disbelief he stood and he stared a while; When their eyes met, they both began to smile....
In Adventure Quest Worlds Harvest Festival Feast event, Oishii looks like she's wearing one of these. At the very least, she's wearing it over a Stripperiffic outfit of the same color.
Equipping an apron but no other top on a female created character in Soul Calibur IV and Soul Calibur V results in their usual bikini top disappearing. Oddly, if the apron is broken, their bikini top reappears.
World Of Warcraft has a similar look when equipping a tabard (and optionally a belt) with nothing underneath it. Notably, since tabards (unlike most armor) aren't damaged when you die, this is used to give some semblance of dignity to "corpse runs". However, since you do not lose your gear when you die, and anything you have in your bags is also damaged when you die, the practicality of this is somewhat suspect. It also makes you look NAKEDER, since the tabard looks accident prone, and covers your underwear.
Tyria from Ar Tonelico 3 wears one over a swimsuit in her true ending.
In SmackDown vs. Raw 2011 equipping an apron results in female's characters bikini top disappearing.
An episode of the German/Dutch series School For Vampires has the main cast go trick or treating. One scene has the kids trick or treating a woman who's handing out candy while wearing a topless apron as a costume.
In a character special in the Bleach manga, Kon goes around interviewing characters around Urahara Shoten. He winds up skipping the interview with Tessai (large, muscular guy) after finding him putting on his trademark apron... with nothing on underneath.
The bonus chapter "Naked A-p0rn" of Elektel Delusion. Shunpei reads a pornographic magazine, with a naked-apron wearing model and discusses what's so good about the trope. Fumi then proceeds to imagine an entire scene with Shunpei wearing one.
The first chapter of Oku-san's Daily Fantasies involves the titular character being "forced" into wearing one by Sudou.
The statue of Vulcan on Red Mountain in Birmingham, Alabama, was built to symbolize the city's thriving steelmaking industry. From most viewpoints, Vulcan looks majestic with a big blacksmith's apron and a raised hand. However, for decades the neighborhoods behind Red Mountain enjoyed the sight of a giant iron butt on top of the mountain, since Vulcan is only wearing the apron and it doesn't wrap around. Recently, the statue was taken down, and repaired. The iron moon is still shining, but it's not aimed at a residential area now.
Mister Mxyzptlk once made Superman powerless and dressed up in only an apron so that a super-powered Lois Lane could rescue him.
In an infamous scene in the classic Woody Allen film Sleeper, at one point protagonist Miles Monroe finds himself in an apartment where some gay men live. Enter the butler, clad only in an apron.
Buzz Hauser (Jason Alexander) at one point in Love! Valour! Compassion!
In Monty Python at the Hollywood Bowl, John Cleese, Graham Chapman, Terry Jones, and Terry Gilliam perform "Sit on My Face" in waiter outfits and aprons. Once the song ends, they turn and walk offstage, revealing their naked buttocks.
Shown in a montage during The Five Year Engagement. Jason Segel is serving Emily Blunt a homemade breakfast in a long sleeve shirt and an apron. We assume he is fully clothed but he turns around to show his behind to the camera and his on-screen fiance.
Blackadder: Baldrick, why are you dressed like that? Baldrick: Do you want the long answer or the short answer? Blackadder: Mm, the short answer. Baldrick: Whim. Blackadder: "Whim". And the long answer? Baldrick: It was a whim, my lord.
In an episode of 3rd Rock from the Sun, Harry decided that clothes were a scam and spent the episode naked. He decided to put on an apron while frying... bacon or something, but frequently had to turn around, exposing his back to the grease. He turned back very fast.
Walt does this (well, except he keeps his underwear on — thankfully) in the first episode of Breaking Bad.
In the Bravo reality show Chef Academy, contestant Emmanuel volunteered to serve a birthday cake to another contestant while wearing nothing but an apron (and a smile, and some body oil!). Since Emmanuel was very, very attractive (he'd had a previous career as a porn star), this was definitely Fanservice.
In an interesting inversion/twist, House starts out an episode making breakfast while naked at his and Wilson's place (when he was supposed to be away on a business trip), where Wilson's latest girlfriend runs into him. This is combined with Naked First Impression and Please Put Some Clothes On when she hands House an apron. (Which he does.)
Fringe: In Back to Where You've Never Been, Peter has a dream that he is back home, which includes his father wearing nothing but an apron while making him breakfast.
Happens in the Midsomer Murders episode "Destroying Angel". Barnaby arrives to question a middle-aged, male suspect only to find him doing a spot of baking wearing nothing but an apron.
Manchild did this once for laughs with Anthony Head's character. It was also a naked body apron in another sense, depecting a nude male body with a fig leaf in front.
Not done for fanservice, since he's a Funny Animal character in a cartoonish everyone-rated game, but Tom Nook from Animal Crossing is wearing just a blue apron while he's running Nook's Cranny.
Clear from Dramatical Murder does this while cooking breakfast for Aoba. Mind you, Clear is still wearing his gas mask despite being naked (aside from the apron, of course).
Timmy's dad went one episode of The Fairly Odd Parents set in a hospital dressed only in an open-backed patient's apron. This was played very much for laughs and Fan Disservice, since Timmy did not appreciate having to see his father's naked ass.