[[quoteright:225:http://static.tvtropes.org/pmwiki/pub/images/19367_5012.jpg]]

''Tonari no Kaibutsu-kun'' is a 2008 manga series that was adapted into a Fall2012Anime by Creator/BrainsBase.

[[EmotionlessGirl Shizuku Mizutani]] only has one thing in mind: getting good grades. To accomplish this goal, Shizuku has little interest in anything else. However, after delivering lesson notes to her resident {{delinquent}} classmate [[HotBlooded Haru Yoshida]], the latter is convinced that they are friends. Initially, Shizuku is intimidated by such a troublesome person, but she gradually notices that Haru is actually a [[HiddenHeartOfGold kind person]]. When Haru [[LoveConfession confesses]] to Shizuku, an [[OppositesAttract unlikely romance]] begins to blossom between them.

The anime has been streamed by Crunchyroll and the manga has been picked up for a North American release by Kodansha USA, both under the title ''My Little Monster''.
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!!Tropes:

* AdorablyPrecociousChild: Shizuku's younger brother, Takaya.
* AlliterativeName: Yuuzan Yoshida, Mitsuyoshi Misawa and Souhei Sasahara (though the latter two [[OnlyKnownByTheirNickname are going by their]] [[InSeriesNickname nicknames]].
* AlmostKiss: Between Haru and Shizuku in Chapter 5.
* AlwaysInClassOne: [[ZigZaggedTrope Zig-Zagged]]. It starts as an aversion with just Ooshima in class A, but Haru gets moved there for second year.
* AmbiguousInnocence: Haru's extreme innocence can occasionally cross over from adorable into mildly disturbing.
* AnguishedDeclarationOfLove:
** When Shizuku confesses to Haru, Haru gently rebuffs her as he doesn't think their "likes" are the same and thus it wouldn't work out if they dated then and there. However, Shizuku takes the rejection in stride and replies that she'll wait for him until he falls in love with her.
*** And when Haru finally does realize and reciprocate his feelings for Shizuku, it ironically ends up around the same time that Shizuku decides to completely focus on her studies and disregard any affection that she has for Haru.
* BewareTheNiceOnes: Micchan may seem like just an easygoing nice guy, but he can [[spoiler: go toe to toe with an enraged Haru, and ''win''.]]
* BlandNameProduct: Ztarbucks Coffee in Chapter 18.
* BlessedWithSuck: Natsume sees her popularity among the boys as this.
** Haru's intelligence also counts. Since his parents were told about their youngest son's intelligence, they paid more attention to him than Yuzan. This resulted in Haru being ignored by his older brother and him being picked on by Kenji. In his late teen years, Shizuku initially resents him because of his intelligence.
* BookDumb: Natsume and Sasayan get borderline passing grades, though he tends to fare better than her by a smidge. Otherwise, they're both grounded in common sense (well, except in areas relating to their own relationships), and play the secondary roles of either enlightening the emotionally clueless Shizuku and Haru or holding a discussion about the two.
* CockFight: Haru and Yamaken will often confront each other, sometimes quite violently, over the affections of Shizuku whenever they meet. And it's guaranteed to happen if Shizuku is present.
* CoolShades: Micchan wears a pair of them at all times.
* DeadpanSnarker: Yamaken.
* DeathGlare: Haru tends to make these not only when he's angry, but when he's confused, scared, or uncomfortable, causing severe misunderstandings.
* DoItYourselfThemeTune: Courtesy of HarukaTomatsu.
* DomesticAbuse: Subverted. Just about anytime Shizuku gets hurt by Haru, it's by accident. Since Haru has such a terrifying temper, he somehow catches Shizuku in the crossfire of his rampage. These accidental attacks are the reason why Shizuku often demands Haru to stay away from her and glares at him.
* DrunkOnMilk: Natsume tends to drink lots of juice boxes when she's upset, and acts like a sad[=/=]angry drunk when she does.
* ElegantGothicLolita: Natsume's zombie costume for the cultural festival.
* EveryoneCanSeeIt: Everyone can see the {{UST}} between Haru and Shizuku and pretty much think they're dating.
* TheFaceless: Shizuku's mother's full face is never shown.
* FirstKiss: At the end of the first episode of the anime. And Haru was totally disappointed by it. Shizuku on the other hand...
* GenericCuteness: Some characters, like Natsume, are explicitly stated to be very good looking but they aren't really drawn any cuter than the relatively more average lookers like Shizuku.
* GreenEyedMonster: Shizuku has her first taste of jealousy when Haru becomes popular with the girls at school. And Haru definitely ''does not'' like it whenever he stumbles upon Shizuku and Yamaken hanging out, [[spoiler:knowing full well that the latter has feelings for the former.]]
* HairTriggerTemper: Haru. This tends to get him into serious trouble.
* HiddenDepths: Haru comes off as an [[HotBlooded impulsive]] [[{{Delinquent}} troublemaker]], but he turns out to be rather innocent when it comes to things like friendships and girls. Also he's a genius.
* HighSchoolAU: [[InvertedTrope Inverted]] when we get some omakes and the anime OVA, which is set in the Edo period.
* HouseHusband: Shizuku's father. Since his business has gone under six times, he gets to spend more time with his son and daughter than his {{Workaholic}} wife.
* IJustWantToHaveFriends: Haru, Natsume, and Oshima. Surprisingly enough, the latter has a friend named Yu, but she doesn't make an official appearance until later.
* InSeriesNickname: Sasahara is nicknamed "Sasayan", Natsume nicknaming Shizuku, "Mitti," and "Yamaken" for Kenichi Yamaguchi. Haru calls Ooshima "Class Rep" before she properly introduces herself to him, and Yamaken's gang has a habit of nicknaming Shizuku, "Study Bug."
* IntelligenceEqualsIsolation: Played with. Shizuku has little to no friends prior to meeting Haru due to her constant focus on studying while Yamaken is intelligent and at times arrogant and merely hangs out with his gang because "idiots amuse [him]." Averted with Haru.
* JustFriends: [[spoiler:{{Defied}}, then PlayedStraight by Yamaken. After being rejected by Shizuku, he said had no intentions of remaining JustFriends with her. Later on, when he overcomes his pride and properly confesses to her and asks her to go steady with him, she rejects him again. This time though, he is less bitter about it and asks if he can take up her offer of being friends, to which she happily agrees.]]
* KidWithTheLeash: {{Invoked}} in just about every volume's cover. In-universe, Shizuku's advice is just about the only advice that Haru considers thoughtfully, and he does what he can to not get in her way when it comes to studying.
* LapPillow: When Haru finds a sleeping Shizuku by the roof, he does this for her.
* LoveTriangle: Quite a few. The first one is between Shizuku, Haru, and Ooshima. Two other love triangles later sprout between [[spoiler:Haru, Shizuku, and Yamaken]] and [[spoiler:Sasayan, Natsume, and Micchan.]]
* {{Megane}}: Yamaken occasionally wears glasses. Haru attempted wearing glasses to gain more popularity (and failed).
* MomentKiller: Haru and Yamaken are often each other's moment killers with it comes to both of them trying to spend time with Shizuku.
** Haru tends to be this in general because of his obliviousness.
* NoSenseOfPersonalSpace: Afer Haru confesses to Shizuku a second time, he tries to get physically close to her. She draws the line after he licks her hand. He eventually learns to respect her personal space.
* NoSocialSkills: Haru really does not know how to deal with people and instead resorts to glaring and violence in order to interact with others. He's slowly learning how to do so without his normal tactics, but he tends to fall back into it fairly often.
* NotSoDifferent: Haru with Natsume and Ooshima in their shared loneliness and [[IJustWantToHaveFriends strong desire to make friends]]. Shizuku with Yamaken in their mutual intelligence, haughtiness, and being {{surrounded by idiots}}.
** Also, Haru and Shizuku with their tendency to create barriers that prevent others from becoming close to them.
* NotWhatItLooksLike: During the cultural festival, Shizuku and Yamaken get into this situation twice: 1) when Haru and Ooshima discover that they're together alone in a room (and eavesdropped on their conversation), and 2) when Yamaken's gang find Yamaken and Shizuku together and assume something happened between Yamaken and "Study Bug."
* ObliviousToLove: Haru to Ooshima. [[spoiler:Shizuku to Yamaken. Micchan to Natsume.]]
** [[spoiler: Natsume to Sasayan. In Natsume's defense, Sasayan's actions are ambiguous enough that it's not obvious to the other characters and even the readers that he has romantic feelings for her.]]
* OppositesAttract: Haru and Shizuku
* PairTheSpares: [[spoiler: Takaya and Ooshima in the Manga's finale]].
* RescueRomance: Ooshima develops a crush on Haru after he rescues her from bullies.
* TheRival: Shizuku sees Haru and Yamaken as rivals when it comes to getting the highest grades. Also, Shizuku's love rival Ooshima for Haru [[spoiler:and Haru's love rival Yamaken for Shizuku.]]
* RunningGag: Haru bringing the chicken to school, Haru covering Shizuku's mouth and pulling her to a corner. Yamaken emerging out the bush after getting lost.
* SavvyGuyEnergeticGirl: {{Inverted}}; Shizuku is the savvy ''girl'', while Haru plays opposite as the energetic ''guy''.
* [[SheIsNotMyGirlfriend He Is Not My Boyfriend]]: Everyone merely assumes that Shizuku is Haru's girlfriend because they always hang out together, to Shizuku's annoyance on how the assumption has been apparently established as fact.
** [[spoiler:Their relationship does eventually enter into this territory later, though.]]
* ShrinkingViolet: Ooshima.
* SingleTargetSexuality: Haru to Shizuku.
* SmartPeopleWearGlasses: Yamaken occasionally wears glasses during cram school and has high marks that rival Shizuku's. Haru averts this by being quite intelligent but only tried wearing glasses to try and become popular.
* TeamPet: The rooster Nagoya.
* TheyDo: [[spoiler: Haru and Shizuku eventually get married in the manga's finale.]]
* [[ThoseTwoGuys Those Three Guys]]: Yamaken's three cronies.
* TitleDrop: The anime puts some posters with an Engrish version of the series title in the Micchan's batting place.
* TrueCompanions: Shizuku, Haru, Natsuma, and Sasayan. They are later occasionally joined by Ooshima.
* {{Tsundere}}: Yamaken.
-->'''Yamaken:''' I don't even care a tiny bit about you, okay?
-->'''Shizuku:''' Huh? What are you saying that for?
** Funnily enough [[spoiler:Sasayan]] acts like Type B towards [[spoiler:Natsume]].
* UnmovingPlaid
* UnwantedHarem: Yamaken's gang to Natsume.
* WhenHeSmiles: Haru quickly becomes popular with the girls at school once he stops scowling and starts smiling (per Shizuku's request).
* WiseBeyondTheirYears: Sasayan can be quite insightful, on top of being one of the few members of the cast seemingly immune to ObliviousToLove.
* {{Yandere}}: [[http://www.mangareader.net/tonari-no-kaibutsu-kun/15/22 Haru might be one]].
* YouWouldntLikeMeWhenImAngry: When Haru gets angry, if no one stops him, he is prone to beat the subject of his anger into a pulp.
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