* ArcFatigue: The childhood proposal mystery. Yes, ''the main plot''. Over 100 chapters has gone by, and only a few details about it have been disclosed. That being said, the chapters that actually focus on the main plot are generally considered the best ones. The problem is that for each main story chapter there's at least five one shot chapters that serve little purpose beyond drawing out the manga. What's more is that even the characters themselves are starting not to care, especially since it's starting to seem like Raku said it to more than one person. Whenever anyone mentions it now it tends to be about how much it doesn't matter.
* AmericansHateTingle: While Kosaki is popular with the Japanese fandom due to her YamatoNadeshiko traits, topping character polls of the series, she is a much more divisive BaseBreaker in Western fandom. In the latter fandom she's either "weak and boring" or "the only truly nice girl in the harem," with little middle ground.
* BrokenBase: Creator/StudioShaft of all companies getting the rights to making the anime adaptation has caused a major split in the fandom. You're either on the side that enjoys the unique ''quirks'' they bring to the Rom-Com genre, or you're on the side that thinks SHAFT's style is just too much of an out-of-place distraction to fuse with this kind of story. The latter opinion only intensified with each Blu-Ray episode release, where the studio added all sorts of color filters to scenes that, in the original TV airing, looked ''completely normal'', leaving watchers to wonder what the hell was the production ''thinking''.
* EarWorm:
** The [[https://www.youtube.com/watch?v=IytV_KVfajQ anime's opening.]]
** [[https://www.youtube.com/watch?v=OkmhxgPanKQ Chitoge's ending.]]
** [[https://www.youtube.com/watch?v=Z0NQkK1sOeQ Onodera's ending.]]
* EnsembleDarkhorse: For side characters, Ruri and Shuu have sizeable fanbases.
* FanPreferredCouple: Several fans, partly due to ArcFatigue and frustration with ever-complicating harem hijinks, have expressed the desire for the story to focus more on Shuu/Ruri than any of the potential couplings of the main characters. To the point that many such fans subjected Raku to some DieForOurShip when chapters 113-114 looked like it was a set-up for Ruri to join his harem, although this sentiment was mitigated with the presence of Shuu and the ShipTease resolution with him in chapter 115.
* HollywoodHomely: People sometimes wonder how someone who looks like Raku could end up with girls like Chitoge. This trope is zig-zagged though, since it's revealed he was actually quite popular amongst the girls in middle school.
* IdiotPlot: Chapter 52, where Raku has to find out Chitoge's measurements in order to open a briefcase. He figures that asking her upfront would label him as a pervert. So what does he do? He sneaks into the girl's room during their physicals, followed by disguising himself as a doctor to look at the charts. And when that all fails, he decides to finally ask her directly. By shouting it as loud as possible in a room filled with changing girls. It's even lampshaded by Raku himself at one point as he wonders why he decided to sneak into the girl's room in the first place.
* LesYay:
** Kosaki and Chitoge have a little bit during their [[http://www.mangahere.com/manga/nisekoi_komi_naoshi/c069/8.html bonding moment]] in [[InnocentInnuendo chapter 69]].
** Paula and Seishirou have a bit as well, though mainly [[{{Yandere}} Paula]].
*** Seishirou actually has a lot of this directed to her, [[EvenTheGirlsWantHer she's very popular with her female classmates]], [[RomanticTwoGirlFriendship Her and Chitoge's close friendship can delve into this,]] and then there is the time she accidentally brought a love potion to school which caused Paula, Chitoge, and even Onodera to fall in love with her. Her reaction almost falls into BiTheWay territory.
** Marika's friend Mikage is described as being a "dirty old man" and is possibly an outright lesbian and it's hinted that the person she likes is Marika, though she says she's saving herself for JohnnyDepp.
** Haru's friend Fuu-Chan has some strong feelings for Haru. There is also Haru's slight obsession with becoming friends with Paula.
*** An extra has Fuu-chan taking pictures of Haru in exceedingly sexy poses, after they're done Haru asks Fuu-chan if she's okay because her [[NoseBleed nose is bleeding]], basically confirming her [[SchoolGirlLesbian being gay]] for Haru.
* RescuedFromTheScrappyHeap:
** Chitoge's CharacterDevelopment with Raku aside, it helps that later chapters caused people to begin to switch their dislike for Chitoge's bitchy attitude over to Haru moments after the latter was introduced.
** Haru eventually as well, basically turning her character into a {{Tsundere}} Onodera after she finally starts to come around regarding how she views Raku.
* RomanticPlotTumor: Between the ArcFatigue and the BalancedHarem staying so balanced that NoRomanticResolution is almost guaranteed, many fans have stated that the main romance is the worst thing about the series.
* TheScrappy:
** Chitoge got this reaction early on for her unjustified harshness towards Raku which mostly came off as annoying to readers.
** Haru, Onodera's little sister, did not leave a good impression on readers shortly after her introduction for almost the exact same flaws people disliked about Chitoge early on...only ''much'' worse.
** Claude can get this reaction from some, for his overprotectiveness towards Chitoge after it stopped being a source of comedy fuel and started getting too creepy. Raku's Yakuza group are at best misguided in their good intentions or being overbearing with it.
* ShipToShipCombat: As expected of a harem show with multiple girls, viewers are split on who they'd want Raku to end up with.
** {{OT3}} After Chitoge and Kosaki started becoming close, and the reveal that they used to be friends as kids, shipping both of them with Raku has started to become popular.
* SoOkayItsAverage: For some.
* StopHelpingMe: Both Raku's Yakuza group and Chitoge's Beehive group are ''insanely'' overprotective of them, and all the times they do something with the intention to help, they only make things uncomfortable for both of them. Raku and Chitoge couldn't have a normal life because of that.
** Claude stands out as the Nisekoi champion of this trope. His overprotectiveness of Chitoge which included, but not limited to, performing body checks on Chitoge's classmates in junior high before they could ''approach'' her and threatening to shoot underlings if they tell Chitoge her cooking is bad resulted in Chitoge's friendless (bar Tsugumi) background until the start of Nisekoi's events and her being a LethalChef as her underlings couldn't tell Chitoge her food was bad so she could never learn what she was doing wrong to improve.
* TheyWastedAPerfectlyGoodPlot: You'd be surprised as to how many people thought the plot from the one-shot chapters were better then the actual overall manga.
* ValuesDissonance: To western viewers it can seem very strange that Kyokou-sensei would quit her job just because she was getting married, or that during the career counciling in 122 marriage would be seen as an alternative to a career instead of a seperate issue. While it is uncommon, but not unheard of, for a woman to quit her job in The West due to getting married, pregnancy is usally the more deciding factor, or more cynical, the husbands income, in Japan and Eastern countries it's common enough to be expected.
* WhatAnIdiot:
** Most of the times, Raku is an AccidentalPervert due to situations beyond his own control. This is not the case in Chapter 52, where he invites it upon himself after pulling one stupid antic after the other.
** Paula in the beauty pageant, who tries to come out as this mysterious beauty to get more votes, and she would have been successful...had she not ''forgotten to sign up her name'', meaning she wasn't even signed up officially.
%%** Haru, full stop.
* {{Woolseyism}}: Marika's proper speech is translated into English as a southern-US accent.
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