* EnsembleDarkhorse: Mako-chan has garnered quite the fandom.
* FanNickname: At several points in the show, Kana sports a T-shirt with "[[GratuitousEnglish I AM BOSS]]" on the front. Considering this and her [[GenkiGirl energetic nature]], her nickname naturally became Boss, or Bossu, for SHE IS BOSS.
* [[FridgeLogic Fridge Sadness]]: There is no sign of any of the cast's parents. A few comments by Haruka imply that they're dead, and that they live on welfare.
* LesYay
** [[spoiler:Hayami and Kana]] in the final minutes of the last episode of the first season, much the latter's horror.
** Also, Chiaki's affections for Haruka sometimes seem fairly [[BrotherSisterIncest unsisterly]].
** Which is still nothing compared to the affections she sometimes shows for ''Kana'', of all people.
** During the first season's beach episode, they both seemed ''really'' eager to see their big sis in a bikini.
** In the finale episode of the fourth season, after hearing from Maki that Atsuko's breasts have grown bigger, Haruka asks her to grope her breasts. She gropes her off-screen.
* NarmCharm: Kana's "[[GratuitousEnglish I AM BOSS]]" shirt. "Boss" can be a synonym for "cool" (or at least it was in the Anglosphere in TheSeventies and TheEighties).
* TheScrappy: Fuyuki, to both Chiaki and some audience members. He's not too well-liked by many fans, as he's not very energetic, and always seems reluctant to join in on any activities by the other characters.
* ValuesDissonance: Or rather, cultural habits dissonance. Now, in Japan one causally or traditionally takes off one's shoes in the home and sits on the floor rather than a chair. So when Chiaki asks "what's there when you sit down but goes away when you stand up?", her answer is "the soles of your feet". Anglophone culture has the same riddle, with the answer being "your lap".

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