* DieForOurShip: Poor, ''poor'' Namura-sensei.
* EarWorm: Every. Damn. Song. Especially "Egao ni Aitai" and "Saigo no Yakusoku".
* FanPreferredCouple: Meiko and Satoshi. Many fans were [[spoiler: visibly irked by Namura's re-entry into Meiko's life, and the abrupt abortion of what seemed a slow-but-steady romantic buildup between her and Satoshi. Many post-series fics have been written [[DieForOurShip with Namura either]] [[DroppedABridgeOnHim dying in a fire]] or turning out to be an [[DomesticAbuse abusive husband]], leaving the door open for Satoshi to play KnightInShiningArmor. However, these fanfics have been subverted by the ongoing sequel, Marmalade Boy Little, where Meiko and Namura are noted to still be together, and that they have a son.]]
** Some people also ship [[spoiler: Bill/Anju]] over [[spoiler: Bill/Jinny]], due to the BirdsOfAFeather deal.
* HoYay: While all three [[spoiler: are proven to be straight or at very least straight-leaning]], it's interesting that of Yuu's two closest friends in the series, [[spoiler: he is suspected of being lovers with one (Satoshi) and the other is long believed to be gay (Bill).]]
** For added hilarity, [[spoiler: the GenreSavvy Bill ''pretended'' to be AmbiguouslyGay (when he was actually a mild CampStraight) so he'd approach the flirty Jinny without being rejected by her.]] Then again, he could be AmbiguouslyBi...
* {{Moe}}: Yayoi
* TheScrappy: Tsutomu. He is (again, arguably) [[RescuedFromTheScrappyHeap later rehabilitated as "comic relief"]] and [[ThrowTheDogABone eventually he dates Yayoi]] in the anime.
* ValuesDissonance: This is not something you want to marathon with anyone overly obsessed with being PC and/or who forgets that the series's [[FairForItsDay pretty dated by today's standards]]. Miki sometimes becomes very clingy and dependant on others, Yuu has occasional moments of chauvinism, and the Meiko-Natchan relationship being portrayed as it does HAS been noted to produce this reaction in some viewers.
* TheWoobie: Oh, so many. Specially Meiko and Ryouko.
** JerkAssWoobie: Kei. Specially in the anime, where we get to see his CharacterDevelopment.
** IronWoobie: Anju, oh Anju.