[[caption-width-right:337: Mars by Kira Aso]]

''Mars'' is a fifteen-volume HighSchool romance manga series written and illustrated by Fuyumi Soryo and serialized from 1996 to 2000.

Kira Aso is a ShrinkingViolet student in the art club with a reputation for [[DoesNotLikeMen disliking men]], when she [[EmotionlessGirl shows any emotion]] at all. Rei Kashino is her polar opposite, a {{Delinquent}} who [[BadassBiker races motorcycles]] instead of worrying about his grades and has a reputation for [[ChivalrousPervert being a shameless playboy]]. They meet one day in a park when Rei is searching for a clinic and asks Kira for directions. Kira draws him a map on a page from her sketchbook, not knowing that there's an important (and beautiful) sketch on the other side of the sheet.

Rei becomes interested in mysterious Kira and begins to half-heartedly pursue her. She resists at first, but after he comes to her aid against bullies and shows her he's not the JerkJock playboy she stereotyped him as, they tentatively become a MoeCouplet. Not all is well in budding-teen-romance-land, however, for both Rei and Kira have skeletons in their closets. Rei is estranged from his only surviving family member and suffers from post-traumatic stress disorder over his twin brother Sei's suicide; Kira has very good reasons for her pathological shyness and dislike of men, and her family is fragile at best. They have to work out their respective problems as well as face the threat of one Masao Kirishima, a sociopath who begins to stalk both of them. The road to HappilyEverAfter is fraught with dangers on all sides, the likes of which normal Japanese teenagers only ever read about in [[ThisIsReality manga]].

This series is notable in that it avoids a number of frustrating romance manga cliches, excels at dramatic suspense, and depicts mental illness and psychological trauma in a nuanced and realistic manner. It also happens to feature really great art and a high-quality English translation.

In 2004, Manga/{{Mars}} was adapted into a [[Series/{{Mars}} Taiwanese live-action drama]]. In 2016 a Japanese remake started airing under the name ''MARS ~Tada, Kimi wo Aishiteru''

!!Provides examples of:
* AbusiveParents: [[spoiler:Kira's step-dad raped her when she was in the 8th grade and Rei's biological mom isolated him and his brother and tried to kill him before he was even six.]]
* AllGirlsWantBadBoys: Played with. Rei is extremely popular in his high school and outside of it. However, [[spoiler: his sometimes violent and borderline sociopathic tendencies scares Harumi away and becomes a major point of division between him and Kira.]]
* AllMenArePerverts / AllWomenAreLustful: Harumi argues this point with Kira when she's attempting to convince her that [[spoiler:she wasn't DefiledForever by her rape]].
-->'''Harumi:''' If you're dirty, what in this world isn't?! All the men are skeevy, and all the girls are selling themselves to those skeevy men. Guys roam around town just waiting for girls to hit on them.
* AlphaBitch: Harumi is a particularly violent variation of this at first.
* AmbiguouslyBi: While romantically, Kira only seems to have eyes for Rei, she talks about the beauty of other female characters in similar terms, and admits to Tatsuya that she would have a crush on Rei even if he were a woman.
* AngstySurvivingTwin: Rei, after Sei's death.
* ArtShift: When the scenery becomes the focus of a page or panel, it's in a style that suggests silver-process photography with the contrast blown out, rather than conventional manga-style background.
* {{Backstory}}: A 'lot' of it, and of the angsty variety, revealed in flashbacks.
* BetaCouple: [[spoiler:Harumi and Tatsuya who hook up later on in the series.]]
* BigFancyHouse: Rei's father's house is like this, to the point of awkwardness. Rei, on the other hand, lives in a crappy apartment in a bad side of town.
* BigScrewedUpFamily: The Kashino family. Provides fodder for most of the {{Reveal}}s, {{Backstory}}, and CharacterDevelopment.
** The Aso family is much, much smaller but about as screwed up.
* BreaktheCutie: Inverted. [[spoiler:Both Kira and Rei are already psychologically broken in their own ways. Part of the story is them learning how to cope and heal.]]
* BrilliantButLazy: Rei is actually very intelligent. He just has zero interest in school.
* ChastityCouple: What Rei and Kira are for a large part of the series to the surprise of all other characters given Rei's reputation. [[spoiler:It has everything to do with Kira's aversion to men.]]
* ClingyJealousGirl: Harumi, Rei's would-be girlfriend, who even ''threatens'' Kira at first. [[spoiler: [[MyGodWhatHaveIDone She gets better]], and after working through her issues, ends up as Kira's best friend.]]
** Rei's ''other'' first girlfriend, who claims she would rather die than be without him and then attempts to prove it.
* DefeatMeansFriendship: Hamazaki, a thug upperclassman, tries to torture Rei after he storms into a senior classroom. This does not go as planned, with Rei easily thrashing Hamazaki ''and'' all of his friends. Once Rei returns from suspension, Hamazaki apologizes and becomes a friend to Rei and Kira, even going by personal nicknames like, "Hama," going to cheer Rei on in the Suzuka 8-hour endurance race, and giving Kira and her mother a discount when his family's company handles their move.
** In a more symbolic example, Harumi and Kira become best friends after Kira finally stands up for herself and Rei makes it explicit that he has no interest in Harumi. [[spoiler:This is later invoked when Shiomi enters the picture, tries to get back with Rei, and Kira passively accepts it. In her words, she did not give up on Rei just so ''Shiomi'' could have him.]]
* DepravedBisexual: Masao Kirishima is an effeminate [[AxCrazy sociopath]] who threatens Kira and Rei throughout the series.
* DoesNotLikeMen: When the story begins, Kira is shy around most people, but avoids even speaking to her male classmates.
* TheDogBitesBack: [[spoiler: Masao killed his childhood friend who abused him so much, his torso is riddled with scars.]]
* DrivenToSuicide: Shiori plays with this; it is part cry for attention, part atonement. Also, Rei saves her before she's killed.
** Sei also commits suicide for a complex set of reasons.
** [[spoiler: Rei and Sei's mother Shoko is revealed to have committed suicide when her children were young. They were the ones to find her.]]
* EarnYourHappyEnding: Escalated to an absurd level in the final volume, when [[spoiler:Masao knifes Rei in the gut on the way to the party celebrating his marriage to Kira. He survives with little or no permanent injury, they get married, and everyone works out their emotional issues.]]
* EasilyForgiven: At the end of the first volume, Harumi takes her bullying of Kira to a ridiculous level by [[CliffHanger preparing]] to smash Kira's fingers with a small barbell. Even though she doesn't follow through, it's a little jarring when they become friends with no mention of this incident.
** Kira's mother takes back the stepfather who [[spoiler: ''raped her daughter''.]]
*** Which could be TruthInTelevision - it's not unheard of for this to happen in real life, depressing as that is.
* FaceFramedInShadow: Kira's stepfather gets this treatment often.
* FaceFault: Realistic example. When Rei promises to protect Kira, he also jokingly offers to "lend [her his] body" if she feels like fooling around. As he's going down the stairs, Kira calls after him and asks him to lend her his body (to use as a model for her painting), causing Rei to slip and fall down the stairs in shock.
* FamilyVersusCareer: Kyoko the biker ends her racing career after a minor injury in the endurance.
* GetOut: Takayuki shouts this at [[spoiler:Shoko after he stops her from killing Rei as a child]].
* GetOutOfJailFreeCard: Even after Masao [[spoiler:knifes Rei, nearly killing him]], the authorities can't put him behind bars because he's legally a minor.
* HeroicSacrifice: To support Kira, Rei swallows his pride, gives up racing motorcycles, and begs his father for help.
* IneffectualSympatheticVillain: Not really a villain, but Rei's father Takayuki is initially set up as an antagonist until it is eventually revealed that he's a {{Woobie}} of the first order.
* InterclassRomance: Downplayed and averted. [[spoiler: Rei lives in near destitution because he refuses his father's money. But once he agrees to accept his help, we learn that Rei is the son of very wealthy CEO. His tour of his childhood home makes Kira a bit overwhelmed.]]
* InformedAbility: Mostly averted. Kira's art looks beautiful, but her greatest painting as it appears on the cover of the last volume is done in conventional alcohol-based marker manga style, rather than oils as stated in the text.
** Even though we are repeatedly told that Kyoko's skills are on par with male racers, her performance doesn't really prove that.
** OvershadowedByAwesome: Its not that Kyoko skills are any less then any of the unnamed male racers as much as Kyoko's skills can not match Rei's skills. The settings on the bike were set for Rei preference after all.
* IronicEcho: "Apples are for eating, not for throwing."
* IWantGrandkids: Rei's father goes off on a brief tangent and says this, much to Rei's dismay.
-->'''Mr. Kashino:''' I don't care how many you have, just start making babies!
* LoveTriangle: Par for the genre. Kira (eventually) likes Rei who (eventually) likes her back, but feels mild guilt because his best friend Tatsuya has liked Kira since middle school. Moreover, every girl loves Rei.
* MamasBabyPapasMaybe: [[spoiler: Rei and Sei are legally Takayuki's children, but everyone knows they're actually his brother Akihiko's.]]
* MamaBear: Rei and Sei's mother Shoko thinks she's this, but she's actually just AxCrazy and more of a threat to her children than anyone else.
* ManipulativeBastard: Masao. Manipulates his way out of psychiatric care and close enough to Rei [[spoiler:to put a knife between his ribs]]. The final scene in which he [[LaserGuidedAmnesia claims not to remember Rei]] is chilling.
* ModestyBedsheet: Partially averted- the female has her back to the reader to provide ''just'' enough cover while the male is covered from the hips down.
* MyBelovedSmother: Shoko again. By the time the boys were 4 she still wasn't even letting them leave the house.
* NiceGuy: Tetsuya
* ParentsAsPeople: One of the themes of the story is that the adults are just as mixed up and vulnerable as the teenage main cast. They love their children very much and always try to do what's best, but for one reason or another fall short. This discovery is healing for Rei, but probably not so much for Kira.
* PolarOppositeTwins: Rei was always very active and prone to getting himself into trouble while Sei was quiet, artistic, and something of a crybaby. [[spoiler: And then the real reason it turned out they were opposites was that while Rei had it in him to be well-adjusted, Sei was actually a sociopath who placed no value in human life aside from him and Rei.]]
* RapeAsBackstory: [[spoiler: Why Kira DoesNotLikeMen.]]
* RealityEnsues: Arguably one of the points of the manga's exploration of psychological trauma, but becomes especially relevant in the latter half of the series. In particular, [[spoiler:Rei tries to protect Kira from her pedophilic step-father by single-handedly supporting her, even going so far as to drop out of school, moving in with Kira, and asking her to marry him to gain legal guardian status. However, after the faults in this plan blow up in his face due to the fact that they're both young and Kira currently still is under the legal protection of her step-father, he begs for his father's help, despite saying he'd NEVER ask him for anything again and trying desperately to sever all familial ties with the older man.]]
* StalkerWithACrush: Maseo stalks both Kira and Rei--Rei because he saved him in the past and Kira because of her personality. Of course, it doesn't stop him from trying to kill them both.
* SuicideIsPainless: Sei throws himself off the roof with a wan smile on his face. Rei is left looking at a corpse that looks just like him.
* ThereAreNoTherapists: Averted, but it doesn't do anyone much good.
* TheirFirstTime: After Kira runs away from home [[spoiler: thinking she may have killed her stepfather]] she and Rei have sex for the first time. Everyone is surprised it didn't happen a lot sooner, given Rei's reputation as TheCasanova.
* TraumaCongaLine: The only characters who seem to be exempt are [[BetaCouple Harumi and Tatsuya]].
* TraumaInducedAmnesia: Rei suffers this as well as extreme violent behavior after Sei's suicide. His psychiatrist and father [[spoiler:use it to rewrite his childhood as having been less horrible]].
* UpperClassTwit: Discussed, thought about, and averted. Takayuki wants Rei to work hard to be worthy of inheriting the family business, and Rei has a hard time schmoozing with successful businessmen.
** ObfuscatingStupidity: When said successful individuals mock Rei at a gathering, he turns their insults back on them by declaring that, while he may be an idiot delinquent, at least he's not a sneering asshole.
* WellDoneSonGuy: Rei.
* WhyCouldntYouBeDifferent: Why does Takayuki disapprove of Rei racing motorcycles? Because [[spoiler:Takayuki's brother Akihiko, incidentally the biological father of Rei and Sei, died in a particularly hideous car racing accident]].
* WouldHitAGirl: Much to Harumi's surprise, Rei. He slaps Shiori for accosting Kira.
** Even more surprisingly, Takayuki as well. He slapped [[spoiler:Shoko after she tried to strangle Rei]].
* {{Yandere}}: In a non-romantic example, [[spoiler: Shoko]] is so insane and so devoted to keeping her children safe that she tries to [[spoiler:strangle them and commit suicide rather than be separated from them]].
** Another non-romantic example is [[spoiler:Masao. His idolization of Rei as someone who can finally understand the depths of his sociopathy and disregard for human life drives him to try to kill Kira when he realizes her influence helps keep the darker aspects of Rei's personality at bay.]]
** And in arguably the most horrific non-romantic example, [[spoiler:Sei. Kira finds Sei's hidden suicide note in his old bedroom and learns that Sei was just as sociopathic as Maseo; he just used his tears to manipulate Rei into doing his dirty work for him and therefore only valued Rei's life. When Rei turned his maliciousness to Sei by "revealing" they aren't their dad's biological sons, he decides to kill himself, knowing that it would leave Rei psychologically scarred and hoping it would force him into enough despair ''to commit suicide, too.'']]
* YoungerThanTheyLook: Rei's neighbor/landlord looks a [[ScaryBlackMan scary man]] in his late twenties or thirties but is only nineteen, and really a very nice man.