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''Adekan'', by Tsukiji Nao, is a [[PeriodPiece historical]] {{shoujo}} manga set in the Meiji era, featuring Yoshiwara Shiro, a sexy umbrella maker with a distinct hatred of underwear, and Yamada Kojiro, an uptight but kind-hearted police officer.

Kojiro makes it his life's goal to teach Shiro the concept of basic decency, and they become unlikely friends along the way. Nevertheless, hitches arrive in the form of gruesome murders, abductions and other strange occurrences, and Kojiro and Shiro must solve each mystery and resolve their conundrums together.

''Adekan'' is especially notable for its impossibly detailed art, as well as the sheer quantity of {{Fanservice}} and innuendo. It's so blatant that the series could almost be considered [[BoysLoveGenre BL]], but it never really crosses the line and both main characters are canonically heterosexual.

There are ten volumes released in Japan as of November 2016.

!!''Adekan'' provides examples of:

* AnythingThatMoves: Anri, and he makes no secret of it. An extra chapter has him trying to seduce a [[spoiler: panda.]]
* ApparentlyPowerlessPuppetmaster: [[spoiler:Anri]] was a Type 2 before he was discovered as an inventor and moved up to middle class. The people that [[SexSlave bought]] [[RapeAsBackstory his]] [[RedLightDistrict services]] let a whole lot of their secrets slip around him, thinking him to be a harmless prostitute. They were in for a rude awakening when he graduated to {{Manipulative Bastard}} and started blackmailing them.
* AwesomeButImpractical: All of Shiro's creations; "umbrellas" plus accessories which are so flowery and wonderfully intricate... But no one in their right mind would be caught dead using them. Explains why business is so terrible most of the time.
* BadassAbnormal: [[spoiler: Anri and Shiro are these, ''especially'' Shiro.]]
* BadassNormal: In contrast, Kojiro is this [[spoiler: to all appearances]].
* BewareTheNiceOnes: Shiro is, more often than not, a decent guy who's willing to help the helpless despite his awkwardness, but if you do anything to [[BerserkButton piss him off]]...
* {{Bishounen}}: Anri and Shiro, beautiful and effeminate.
* BitchInSheepsClothing: Any number of the Killers of the Week; often it's the sweetest and friendliest person who's the murderer. [[spoiler: Later in the manga, Sakura fits the male version of this trope to a T.]]
* BodySushi: Was served to Shiro on a muscular drag queen's body, resulting in much foaming at the mouth.
* BreakTheCutie:
** Kojiro's naive friend Ippei, formerly a one-shot character, is slowly being turned into emotional mincemeat over the course of the latest chapters...
** The "neko-onna" girl in the first volume comes pre-broken...as do Shiro and Anri both.
** Subverted with [[spoiler: Kusuko. Despite being incredibly sheltered all her life and then subjected to horrifying, creepy experiences, once away from her slaver father and out in the real world, with Kojiro and Shiro's encouragement and the help of some kind nuns, she seems to be surprisingly okay.]]
* ChickMagnet: Shiro and Anri, and sometimes Kojiro to an extent. The girls all swarm after them in droves. [[EvenTheGuysWantHim Even men are not immune]].
* ConditionedToAcceptHorror: This applies to practically anyone who manages to live beyond childhood in 'The Group'. Especially the women though, who [[spoiler: die from giving birth and are conditioned to see death by childbirth as something honourable]].
** Anri also shows signs of this, and never even implies that what [[SexSlave happened to him]] during his childhood was wrong or traumatizing.
%%* {{Crossdresser}}: [[NaughtyNurseOutfit Poor Shiro]].
* CuteAndPsycho: It's hard to predict what Anri will do when he appears, but the odds are usually good that there'll either be brutal, creative bloodshed, or Anri cozying up to Shiro and toying with the oblivious Kojiro for fun and profit.
* DarkAndTroubledPast:
** Shiro and Anri have a long shared history, and not much of it was happy, judging by the flashbacks.
** Even Kojiro doesn't seem to be exempt from this, for [[spoiler:his memories have been wiped, and it seems that he's been involved with Anri and Shiro as children.]]
* DeclarationOfProtection: While not exactly declared out loud (he does think along those lines several times), Koujirou wishes for nothing more than to protect Shiro. Shiro, in his turn, is also quite protective of Koujirou, though he's less obvious about it until much later in the series.
* DudeLooksLikeALady: Shiro is often mistaken for a woman, especially when decked out in full costume. Hell, even when he's mostly naked in a public swimming area he gets confused guys checking him out.
* EvenTheGuysWantHim: Shiro and Anri are Dude Magnets to an almost incredible degree -- even now as adults but especially when they were younger. Anri deliberately plays it up while Shiro is disgusted by it, though not above using it to his advantage if the situation dictates.
** In one story, a man blatantly hits on Shiro, touching his face and comparing his eyes to ”dewdrops”. To be fair, Shiro was turning up the sex appeal in order to manipulate him. Turns out that [[spoiler: the man intended to capture Shiro for his beauty, planning to sell his services in prostitution.]]
** Saburouta's friend and co-worker Wakabayashi has admitted to "fucking Shiro at least fifty times" in his mind.
** [[DepravedBisexual Anri]] is not shy about expressing his affection for Shiro, his "beloved sworn brother."
* {{Fanservice}}:
** The HoYay is rampant, and there are plenty of half-naked men prancing about in suggestive positions. And that's nothing to the incredibly suggestive, elaborate, and fanservice-y CostumePorn and {{Cosplay}} that's rampant in every episode.
** In-universe, Kojiro's muscles are this for a rather enormous number of people, including a one-shot character from the first volume who reappears specifically to ogle Kojiro while awkwardly trying to work out how to confess to him.
** Anri deliberately makes himself into Walking Fanservice. From what we've seen, his reasons for doing this were [[SexSlave less than]] [[DistractedByTheSexy family-friendly]].
* GameFace: {{Bishounen}} Shiro has one. Pray you never, ever see it.
%%* GirlInABox: Quite literally.
* GodivaHair: When [[spoiler: Kusuko]] beckons to her father and asks him to [[IsThatWhatTheyreCallingItNow "learn with her"]], stark naked.
** [[spoiler: Anri's]] hair grows to this length after he [[spoiler: de-ages]] himself. It doesn't last long since he deems it to be 'in the way' and chops it all off again.
* HarmfulToMinors: The Land of the Flesh is harmful to EVERYONE, but the children definitely get the short end of the stick.
* HeroicBSOD: After burying [[spoiler: Sae]]. Shiro doesn't fly into a rage, but his [[ThousandYardStare half-insane expression]] is far scarier.
%%* HotBlooded: Kojiro.
* HiddenWeapons: Shiro, Anri, and the other members of their gang have a collection of assorted weaponry strapped on their person.
* IJustWantToBeYou: ''All'' three women of the Mermaid arc were extremely jealous of one another for various reasons, but all three hid their true feelings. It's revealed later that [[spoiler: they each planned on murdering their rival on the very same day.]]
* LovableCoward: Saburouta, although he does have his moments, especially when it's Kojiro in danger.
* MadnessMantra: ''"Onna-neko... help me... onna-neko..."''
* MonsterOfTheWeek: Or Villain/Problem Of The Chapter, as each chapter is a mini self-enclosed arc, with the main issue usually resolved before the chapter closes. Also means that there are quite a few {{One Shot Character}}s.
* NiceGuy: Kojiro is the real deal. He's uniformly kind to and likes women (he tells an aging actress how beautiful she is, and comments on seeing a group of ladies of...varying looks that he finds all of them attractive in different ways), is a good and supportive brother to his dorky siblings, takes his job as a cop incredibly seriously, can't stand to see injustice done, and works hard to befriend Shiro and teach him the "proper" way to live. No wonder Shiro cares for him so much.
* {{Nosebleed}}: Kojiro gets this in Chapter 31 while watching Shiro being suckered into feminine, sexy cosplays. He's mostly irritated that Shiro was naive enough to believe in Wakabayashi's scheme of getting him in them, but at the same time, it elicits a perverted reaction out of him.
* NotWhatItLooksLike: In the very first chapter. Kojiro walks into Shiro's house to see a woman bending over him whilst he is ''stark naked''. Turns out that she was just covering him up.
* OneManArmy: Both Anri and Shiro fall under this since both are capable of defeating, [[spoiler: or in Anri's case murdering]], entire groups of people with little to no effort.
* OnlySaneMan: Anri's subordinate Shinzo, who is deeply faithful to him but immune to his over the top antics and come-ons. Kojiro can also be this for the good guys...[[KindHeartedCatLover unless cats are involved.]]
* OverprotectiveDad: Kusuko's father would do anything for her. He would even lock her inside a box for the entirety of her life, just to shield her from outside influences. [[spoiler: This backfires on him ''horrifically'' and he snaps.]]
* {{Pixellation}}: ”Accidents” happen, but we are spared a view of Shiro's crotch by a slapped-on "18+" and pile of pixels.
* PleasePutSomeClothesOn: Kojiro to Shiro, though less and less as the manga progresses.
* RunningGag:
** Kojiro trying to wrestle Shiro into some damn underwear (and, half the time, trying to feed him at well).
** Kojiro loves cats. Cats don't love Kojiro.
** The coppersmith's young daughter makes a few reappearances in omake and later chapters. Each time, she wants to confess to Kojiro but winds up [[DistractedByTheSexy compromised by his muscles.]]
* SceneryPorn: Tsukiji Nao, like Shiro, loves to add a ''ridiculous'' amount of detail to her work.
* ShoutOut: Saburouta's distinctive hairstyle is a homage to Goku from ''Anime/DragonBallZ''.
* SuperDeformed: Many chibis in the funny scenes.
* TallDarkAndHandsome: Both Shiro and Kojiro could qualify as this.
* VillainousBreakdown: Happens all too often as the antagonists of each arc dramatically break down and confess their motives.
* WouldHurtAChild: One woman would murder babies for money and love.
* {{Yandere}}: Anri flip-flops between this and CuteButPsycho. [[spoiler: Sakura, on the other hand, turns out to be a cut-glass example to his "big brother".]]
* YaoiFangirl: Wakabayashi's older sister, who appears in a few of the side stories, is a full-blown {{Fujoshi}}. She once disguises herself as a fortune teller and recommends ''lotion sumo'' as a solution to the main characters' personal problems.
* YoungerThanTheyLook: The characters are drawn with very mature appearances and already have full-time jobs, making readers assume they're in their twenties. But most are still in their teens: Shiro is only 16, Kojiro is 17, Anri and Saburouta are 18.