[[quoteright:175:http://static.tvtropes.org/pmwiki/pub/images/MFAkira2Shirogane_9512.gif]]
[[quoteright:175:Hey, why is this picture in color?]]

''Monochrome Factor'' is a Japanese manga series written and illustrated by Kaili Sorano. The story follows the exploits of Akira Nikaido, a lazy high school student. His life changes when he meets Shirogane, a man who suddenly appears and tells him that they share a fate, though Akira is understandably skeptical. Later while Akira is helping a friend Aya she is kidnapped by a shadow monster. This event forces Akira to recognize his role in restoring the balance between the human and shadow worlds.

First serialized in Mag Garden's bi-monthly {{Manga}} magazine ''Comic Blade Masamune'' in May 2004. When the magazine ceased publication, the manga began serialization in the new and revamped magazine, ''Comic Blade Avarus'', in September 2007. The series is now completed.

An {{Anime}} adaptation produced by GENCO, and animated by studio {{Creator/ACGT}}[[note]]with assistance from AsahiProduction and StudioComet[[/note]], premiered on TV Tokyo on April 7, 2008. It later aired on other networks such as AT-X and TV Osaka. The anime has shōnen-ai themes which are almost completely absent from the manga. Originally running from April 7th, 2008 to September 29th, 2008, the anime consists of 24 episodes.

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!!Tropes associated with this work:

* AlasPoorVillain: Nanaya's not exactly the most sympathetic guy on the planet at first. [[spoiler: Then he gets the crap beaten out of him by Shirogane (who ''cuts his arm clean off'' without even batting an eyelash), narrowly manages to escape death by fleeing back to the shadow world, only to promptly have his ''skull crushed'' by Homurabi when he arrives. And the kicker is, ''that's not even the worst thing that happens to him in this manga.'' Nanaya's life just plain sucks.]]
* AMagicContractComesWithAKiss: Occurs in the first episode of the anime. Though it's debatable at first whether Shirogane kisses Akira because it's a crucial part of the contract formation or because he just wanted to.
* ActionGirl: Aya.
* {{Adorkable}}: Kengo.
* AncientConspiracy: [[spoiler: The backbone of the main plot, including Shirogane's exile and Ryuuko's assassination are the direct result of this on Homurabi's part.]]
* AllGirlsWantBadBoys: Presumably part of the reason why Akira is so popular with the girls in his class.
* AllThereInTheManual: Though MonochromeFactor is more or less free of this for the most part, Sorano does from time to time include little character profiles in the manga detailing things that don't generally come up in the main narrative--like their favorite food, favorite video games, favorite TV shows, the creator's impressions of their personality, et cetera.
* AnythingThatMoves: Kou, at least in the anime canon.
* AntiHero: Akira falls under type 2, [[spoiler: while Shirogane is more of a type 4.]]
* ArtEvolution: Kaili Sorano's artwork has evolved steadily in just the short few years Monochrome Factor has been running. For the best examples, just compare [[http://www.mangafox.com/manga/monochrome_factor/v01/c001/13.html this scan]] from volume 1 and [[http://www.mangafox.com/manga/monochrome_factor/v08/c038/11.html this one]] from volume 8 (sort-of-spoilers for the second one).
* AuthorAppeal: Sorano calls Lulu the "God of Boobs," and flaunts her cleavage often. (Especially in that one panel of her and Aya [[HoYay pressing their naked]] [[{{Fanservice}} bodies together]].)
* AxCrazy: [[spoiler: Kengo in his berserk form.]]
* BackFromTheDead: [[spoiler: Uh... hi, Nanaya.]]
* BadBoss: Homurabi. And ''how.''
* BadassBoast: Kou lays one down on [[spoiler: Sawaki]] right before their big showdown.
--> [[spoiler: "Though on the surface you looked uptight, you were a diligent and good person. That's what the kings said about you. Did you think you could be forgiven due to that praise? Ryuuko and I are the only ones who know your sins... know what you did. So I want to stop... no, sorry. That's a lie. I came to ''kill'' you."]]
* BadassGrandpa: Aya's grandpa is the ''epitome'' of this.
* BadassInANiceSuit: Sawaki ''is'' a pretty snazzy dresser.
* BadassNormal: Aya. She's formidable with one sword [[spoiler: and it turns out she's even better with two. And this is before Shirogane gives her Kuresame.]]
* BadassLongcoat: [[spoiler: All four of the Kings.]]
* BaseballEpisode: Not explicitly Baseball, but the anime did have a tennis and boxing episode?
* BedmateReveal: In the beginning of the second episode, Akira, wondering if what happened last night was a dream turns around...and ends up face to face with Shirogane.
* BerserkButton: In Volume 5 of the manga, Kou has a brief run-in with Sawaki, one of Homurabi's Children. Though it's very clear that the two don't like each other, the exchange between them isn't especially hostile. Until Sawaki makes the mistake of [[spoiler: asking Kou to give his regards to "Ryuuko's successor," meaning Akira. Ryuuko is already a painful subject for Kou, and Sawaki was one of the people who betrayed him. Safe to say, just hearing Sawaki ''mention the late King's name'' is enough to send him into a brief rage.]]
* BigBad: Homurabi. [[spoiler: Though in recent chapters, it's starting to look like Shirogane's filling that role.]]
* {{Bifauxnen}}: Shou[[spoiler:ko]]
* BittersweetEnding: [[spoiler: By the end of the manga, Akira has fully awakened as king alongside Shirogane, and Homurabi has redeemed himself and earned the forgiveness of his Children. That doesn't change the fact that Kengo's still dead, and the only person who remembers that either him or Akira ever existed is Aya, who had to return to the human world alone. And that means Kengo's sister forgot about him too. Ouch.]]
* BlessedWithSuck: Kengo's [[spoiler: dark factor]] makes him extremely powerful. [[spoiler: It also causes him to black out, lapse into an animalistic, AxCrazy mode, and attack everything around him. Then Homurabi kills him to take his powers, and uses them to beat the crap out of his best friend.]]
** Also, the kings. Incredibly strong, but [[spoiler: forced to abandon everything and everyone they knew from the human world to accept their kingship. Shisui in particular had issues with this one.]]
* BondageIsBad: Kou, in the anime adaptation, is implied to have a bit of a bondage fetish, present for no other reason than to creep Aya out after she beats him up and he ''begs for more.''
** TooKinkyToTorture
* BrainwashedAndCrazy: Pretty much anyone that gets possessed by the kokuchi.
* ButtMonkey: God, poor Kengo.
* CanNotSpitItOut: Akira is forced by Aya to apologize for his behavior to Kengo. What does he do? [[spoiler:He gets half of "sorry" out, then body-slams Kengo and takes off.]]
--> "I'm never gonna say that, you idiot!!"
** He does, finally, manage to apologize to Aya, and even embraces her, [[spoiler: right before accepting the kingship, which effectively should erase any memories that she, and anyone else in the human world, has of him.]]
* CampGay: Shirogane--but only in the anime. Even in the drama CD, where Shirogane still has the same voice actor, he pretty much avoids the camp gay altogether.
** Certain scenes in the anime suggest that it is somewhat part of his "mask".
* CatchPhrase: Akira's, especially in the anime, might as well be "Ahou ka?" ("Are you an idiot?")
* ChronicBackstabbingDisorder: [[spoiler: Damn near all of Homurabi's subordinates. Either they outright join Akira's side against him, like Nanaya and Lulu, or they deliberately subvert his plans from the inside, like Sawaki. Shiki is the only one who is technically still on Homurabi's side, but it's been established that not even he's 100% loyal.]]
* ClassRepresentative: Aya is this, and constantly berates Akira for skipping class.
* CloudCuckooLander: Though this part of his personality is pretty much gone by the current point of the manga, Akira showed some signs of this early on.
* CoolBigSis: Kengo's sister, Mayu.
* CreatingLife: [[spoiler: Kou was, in fact, created by Ryuuko, using a technique that basically makes him an odd amalgamation of a human and Rei. Most likely in ''direct response'' to Kou's creation, the technique was later permanently banned, and a few lines of dialogue in the flashback arc imply that there was probably some debate among the kings as to whether Kou should have even been allowed to live. As one might expect, this whole ordeal has left Kou with some slight daddy issues, existential angst, and general self-loathing.]]
* CrouchingMoronHiddenBadass: While definitely a weakling as a kid, years of backing Akira up in schoolyard fights and training himself by night have morphed Kengo into the utter epitome of this. Even Akira, who makes a habit of demeaning Kengo on a regular basis, still is willing to admit that he's strong. [[spoiler: Still didn't save him against Homurabi though.]]
* DatePeepers: Occurs in one episode of the anime, when Kengo and a girl from their school apparently are going on a date. It turns out she really just wanted someone to confide in about her girlcrush on ''Aya.'' [[spoiler: Though she does apparently develop a thing for Kengo by the end.]]
* DarkIsNotEvil: While the Monochrome Factor universe is split up to a light and dark world, it's stressed that there's no real "good" or "evil" to either side--they both exist in order to preserve balance, and one side can't exist without the other. Slightly subverted in that the "light" side does seem to have a disproportionately high number of "good" characters, but that also may be because we've only encountered a few of them.
* DeadForReal: [[spoiler: While it's stated that Akira ''could'' choose to give Kengo back his inshi to revive him, he instead gives it to Shirogane to fully restore him to his old self. ]]
** [[spoiler: Though Sawaki did ultimately survive his duel with Kou, after being visited by Ryuuko and Kengo's spirits, he chooses to join them in the afterlife rather than continuing to live as a Shin. He commits suicide with one of his spears off-panel. ]]
* DeadpanSnarker: Akira. Sawaki too, on Homurabi's side.
* DeadlyDecadentCourt: [[spoiler: One of the Kings of the Light is dead because his subordinate killed him, the other went into hiding, and the two kings of Shadow are out to kill each other.]]
* DeathSeeker: [[spoiler: Kou. And as of the final arc, he nearly succeeded.]]
* DefeatMeansFriendship: [[spoiler: Aya and Lulu.]]
** [[spoiler: Also, to the frustration of many fans, Homurabi.]]
* DesignatedGirlFight: Aya vs. Lulu, both in the anime and the manga.
* DoesThisRemindYouOfAnything: In the second episode of the anime (which is known for a lot of invented and embellished HoYay subtext), there's a scene where Akira needs to pull a couple of spikes out of Shirogane's back. The camera angles, the characters' expressions, and the fact that both of them are shirtless makes the whole scene look very... ''inappropriate,'' to say the least.
* DoomedByCanon: Seeing as we know from very early on that Akira is Ryuuko's reincarnation, once the Ryuuko-centric flashback arc gets going, readers know ''exactly'' how it's going to end.
* DoubleAgent: A big part of the second half of the anime is that one of the main characters could be this. [[spoiler:You're set up to believe early on that it's Shirogane. Turns out to be Haruka.]]
* TheDragon: Sawaki
* DrivenToSuicide: [[spoiler: Sawaki. Kou spares his life after their duel, but after a brief conversation with Ryuuko and Kengo's spirits, he decides he'd rather go with them than continue living.]]
* DrivesLikeCrazy: Though this is pretty much consistent with her role as TheDitz, in the anime Mayu has a little bit of a problem distinguishing between the brake and the accelerator.
* EasilyForgiven: [[spoiler: Homurabi. Though apparently all it takes for Homurabi to stop being evil is for Shisui to look at him sadly and Shirogane to slash him, so it all kind of evens out.]]
* EmbarrassingNickname: Lulu has a thing for calling Kou "Pochi."
* EmotionlessGirl: Hiryu.
* ElegantGothicLolita: Lulu.
* EpiphanyTherapy: Occurs ''a lot'' in the anime.
* EstrogenBrigadeBait: Kou. Troubled past? Check. Emotional and physical scars? Check. Sexy voice? Check. Looks great with his shirt off? Check. Comfortable with man-on-man scenes? [[http://www.mangafox.com/manga/monochrome_factor/v05/c022/19.html Check.]] Akira and Shirogane are also great examples.
* EveryoneCallsHimBarkeep: Master's real name is Shuichi Wagatsuma, but everyone really just calls him Master.
* EvilRedhead: Homurabi. And also...
* EvilSoundsDeep: ... Homurabi again. Sawaki too, in his one appearance in the drama CD.
* EyepatchOfPower: Nanaya, [[spoiler: though it's gone by his second appearance.]]
* FamilyUnfriendlyDeath: Kaili Sorano almost seems to have an aversion to killing off characters, but when she actually ''does''... hoo boy. Just as a basic rundown:
** [[spoiler: Nanaya - Homurabi grips either side of his head, lifts him off the ground, digs his nails into his scalp, and crushes his skull.]]
** [[spoiler: Kou - Sawaki pins his right hand to a column with his spear, then leaps back, summoning a flurry of other spears to finish the job. The shot at the beginning of the next chapter shows him impaled through the chest, stomach, left thigh, and right knee, with blood flowing down the column behind him.]]
** [[spoiler: Ryuuko - Sawaki impales him from behind with his spear. When he withdraws the weapon, Ryuuko stumbles forward into Homurabi, who calmly ''reaches his hand into the wound'' to pull out his light inshi.]]
** [[spoiler: Kengo - Caught by Homurabi, who lets the poor kid suffer in fear for a few pages as he casually relays his plans to Shirogane. Then he digs his fingernails into Kengo's chest, violently ripping out his dark inshi.]]
** [[spoiler: It should be noted that Nanaya and Kou are the only two of these who manage to not die permanently.]]
* FingerlessGloves: Nanaya.
* FirstKiss: Shirogane gives Akira this in the first episode of the anime.
** SacredFirstKiss: Dives into this trope, if only slightly, due to Akira's reaction [[spoiler: even much later, when Kou brings up what Shirogane first did to Akira, the first thing that comes to mind is Shirogane kissing him.]]
* FlippingTheBird: Akira flips off Homurabi right before their first fight. This could honestly count as a DidYouJustFlipOffCthulhu.
* FrozenFace: Hiryu.
* GenkiGirl: Lulu and Mayu.
* GoOutWithASmile: Both Ryuuko and [[spoiler: Kengo.]]
** [[spoiler: Also Sawaki, right before spearing himself in the head.]]
* GoodIsNotNice: Akira is, overall, a pretty good person. That doesn't stop him from being a ''complete jerk'' to the people closest to him.
* HardDrinkingPartyGirl: Mayu.
* HeirToTheDojo: Aya.
* HeyItsThatVoice: Daisuke Ono as Akira in the drama [=CDs=] and anime adaptation.
* HeelFaceTurn: [[spoiler: First Lulu, then Nanaya. No one ever dies in Monochrome Factor. They just switch sides.]]
* HealingHands: Master, with a side of HarmfulHealing.
* IAmWho: [[spoiler: Akira is the previous direct king of Light's [[{{Reincarnation}} Reincarnation]].]]
* ImmortalityBeginsAtTwenty: Pretty much all of the immortal characters appear to be frozen in their late teens or early twenties, with the exception of Shiki. [[spoiler: Though even he plays this one totally straight when he shows his "true form."]]
** This trope is especially relevant in Kou's case, who appears to have only two distinct life stages: [[spoiler: a twenty-five year old man, and a big white doggie.]]
* ImpaledWithExtremePrejudice: [[spoiler: ''Kou,'' Jesus Christ.]]
* IneffectualLoner: Kou . Though he ''is'' very strong, by the time the main story rolls around his power has waned considerably, and any attempts to do anything alone tend not to end well. He gets roughed up so badly while fighting just regular kokuchi that he apparently has to do minor surgery on himself, and his big, climactic battle against [[spoiler: Sawaki]], um... doesn't go very well.
* ItRunsInTheFamily: The Suzuno family. Aya, her father and her grandfather are all sword-wielding, short-tempered people who value honor. Aya's mother is the only non-fighting one, but she isn't too inclined to stop them when it gets out of hand.
* JerkWithAHeartOfGold: Akira.
* KarmaHoudini: [[spoiler:Arguably, Homurabi.]]
* KillTheCutie: We'd just like to reiterate, [[spoiler: ''God,'' poor Kengo.]]
* KnifeFight: Akira and Nanaya.
* LargeHam: Shirogane in the anime, hands down.
* LookBehindYou: After Aya catches Akira and Kengo skipping class, Kengo attempts to distract her by shouting "Oh my! Look over there! A pile of X-rated magazines!" ''It works.''
* LuminescentBlush: ''Akira'', of all people, starts having them in the anime, whenever Shirogane gets a little too touchy-feely.
* MagicalGirlWarrior: The Anime comes across as a [[GenderFlip gender flipped]] version of this, with Akira being the Magical ''Boy''.
* MoodWhiplash: Sawaki goes from [[spoiler: asking Ryuuko and Kengo's spirits if he can "go with them" to complaining (complete with humorously mock-serious face) that he won't be able to tease Kou anymore to ''preparing to stab himself in the throat with his own spear.'' Never mind Chapter 56, where we go from Kengo fanboying over Akira's new king's robe to him being ''stabbed through the chest'' with Homurabi's claws. Ouch.]]
* MysteriousPast: Shirogane.
** Kou's has been the focus of the past several chapters.
* NewTransferStudent: [[spoiler: Lulu transfers into the trio's school after Aya defeats her.]]
* {{Nosebleed}}: Mayu.
* OlderThanTheyLook: [[spoiler: Shiki's real form appears to be around 20 years old.]]
* OnlyOneName: Pretty much all of the non-human characters.
* OrdinaryHighSchoolStudent: Akira, Aya and Kengo.
* ParentalAbandonment: Aside from Akira commenting that his family's Buddhist to get Shirogane (who he first thinks is a crazy cultist) off his back, we've had absolutely no sign of his parents in over fifty chapters. Given his personality, it's not implausible to assume that they're not very close.
** This might be the case for Kengo too. Though he seemed to have a pretty decent relationship with his parents as a child, they don't really seem to be around much in his teen years. Adding that to the fact that he, Akira, and Kou seem to spend all major holidays together...
* PartialTransformation: Kou is an interesting example in that he really ''can't'' fully transform, [[spoiler: or he'll disappear.]]
* PerpetualSmiler: Shirogane is this, though it gets toned down further along in the series.
* PowerFist: Kengo and Kou use these are their main weapons.
* PowerIncontinence: [[spoiler: Kengo's dark factor abilities probably qualify. At full capacity, he's practically one of the strongest people in the series--problem is that the second his powers kick in, he blacks out, loses all sense of friend-or-foe, and attacks damn near everything he sees.]]
* RageAgainstTheMentor: Akira's attempts to find out more about the Shin and kokuchi are frequently rebuffed by Shirogane until [[spoiler: Lulu reveals to Akira that Shirogane is a King of the Shadow. He then forces Shirogane to reveal that Akira is the reincarnation of the King of the Rei, or light.]]
* RapunzelHair: Shirogane, Homurabi and [[spoiler: Ryuuko.]]
* ReallySevenHundredYearsOld: Practically all the non-human characters.
* RedEyesTakeWarning: Akira in his Shin form.
* RoyalBlood: [[spoiler: Shirogane and Ryuuko (and by extension, Akira).]]
* SequelHook: The Monochrome Factor anime ''really, really'' tried to do this, with [[spoiler: Homurabi and Ryuuko making their first appearances in the last episode as well as Shirogane apparently disappearing.]] Unfortunately, or perhaps fortunately, the show's poor reception means it's unlikely to go any further.
* SittingOnTheRoof: Akira and Kengo's favorite spot for avoiding classes.
* TheSlacker: Akira.
* SmokingIsCool: Kou.
* SparedByAdaptation: [[spoiler: Nanaya]] is the only main character who dies in the anime. Justified, since the anime was released before the manga had a chance to kill anyone else yet.
* SpoilerOpening: The anime opening of course. There's no way of hiding the fact both Kengo and Aya will have major roles; even Kou shows up long before he does in the show! Ironically, the only major characters that don't make an appearance are [[CanonForeigner Haruka and his butler]].
* SummonMagic: The kokuchi.
** [[spoiler: Lulu also summons a giant snake in her second battle with Aya.]]
* SwordCane: Shirogane.
* SwordFight: [[spoiler: One started up between Homurabi and Aya by the end of Chapter 58. And it was ''awesome.'']]
* ThirdPersonPerson: Lulu.
* ThouShaltNotKill: Akira has no problem beating the living daylights out of his best friend, sometimes for ''no apparent reason.'' But he has serious issues with outright killing, as demonstrated the numerous times he stops Shirogane from killing a person possessed by the kokuchi and [[spoiler: his unwillingness to put Nanaya out of his misery.]]
* ThreeAmigos: Akira, Kengo, and Aya. Surprisingly enough, there's been next to no romantic development between the three of them, unless you count some potential HoYay between Akira and Kengo.
* TransformationSequence: Akira, Kengo, Aya, and Kou all have them in the anime.
* {{Tsundere}}: Akira borders on this from time to time--especially in the manga.
* UnderdogsNeverLose: [[spoiler: Akira awakens Ryuuko for a short time in order to beat Nanaya, and Aya gains a second sword in order to beat Lulu.]]
* UnexplainedRecovery: [[spoiler: Nanaya, who somehow managed to survive getting his ''skull crushed'' by Homurabi early on in the series. It's insinuated that Homurabi revived him by using a bastardized version of the same technique that Ryuuko used to create Kou. It just didn't work very well.]]
* UnstoppableRage: Surprisingly, subverted on two counts, and during the same general arc:
** First there's Kou, who [[spoiler: launches into an all-out berserker assault against Sawaki, as a last-ditch effort to make him pay for Ryuuko's murder before he overuses his power and disappears. Sawaki defeats him exactly one chapter later.]]
** Then there's Akira, who [[spoiler: is mere seconds too late to save Kengo from having his dark inshi ripped from his chest by Homurabi, effectively killing him. After Kengo's big [=TearJerker=] death scene, Akira breaks up the fight between Shirogane and Hommurabi, dramatically screaming ''GIVE KENGO BACK!'' at the very end of the chapter. Then Homurabi spends the next two chapters kicking his ass.]]
* VitriolicBestBuds: Akira and Kengo ''are'' this trope.
* WolverineClaws: Homurabi has very, very, ''very'' sharp nails. [[spoiler: Nanaya and Kengo found this out the hard way.]]
* WombLevel: [[spoiler: In her second fight with Aya, Lulu turns the room into a mass of flesh that she can control, complete with mouths full of teeth that attack Aya and her grandfather.]]
* WhipItGood: Lulu's main weapon.
* [[{{WhyDidItHaveToBeSnakes}} Why Did It Have To Be Ghosts]]: Aya is deathly afraid of ghosts. The spots where "ghosts" are often seen are places where kokuchi gather. The group has to seal up the tears where the kokuchi enter and fight them. Do the math.
* YouCanSeeMe: Shirogane is invisible to ordinary humans, so you know this one happens from time to time. Moreso in the anime, for whatever reason.
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