* BigLippedAlligatorMoment: Mafuyu is holding a potato for much of the beginning of episode 10, but after Ken asks, "Why do you have a potato?", it is never seen or asked about again.
** Possibly a {{shout out}} to [[Manga/HeavensLostProperty Ikaros's watermelon]].
* EarWorm: The cute ending theme ''"Mosou Fetish"'' ("Fantasy Fetish").
** The opening theme is pretty catchy, too...
* EnsembleDarkhorse: According to the [[http://i48.tinypic.com/260edky.jpg recent character polls]], Mafuyu is the most popular character in the show. She even made it to the Top 8 during Saimoe 2010.
** Ken's sister Ringo is very well received by the fans. The 5th episode and 6th episode where she made an appearance received above 80% positive response, currently the show peak record.
* GeniusBonus: One ImagineSpot shows a group of boys going ga-ga over Minatsu teaching math. The writing on the blackboard behind her is a proof of [[http://bit.ly/kX8PH Euler's identity]], "the most beautiful theorem in mathematics."
* LesYay: Several instances between Kurimu and Chizuru, like in episode two when Chizuru turns Kurimu into her pet, mindslave thing... yeah... IllBeInMyBunk
** In the LightNovels when making a radio show Kurimu makes [[IncestSubtext Minatsu and Mafuyu]] read a {{yuri}} script on air. Ken was pleased with this.
* NightmareFuel: Chizuru is SCARY.
** The suddenness and NightmareFace in the Higurashi reference ([[http://www.youtube.com/watch?v=GRKF5x-TbKg scene here]]) also qualifies.
* {{Tearjerker}}: Chizuru's reconciliation with her PoisonousFriend from junior high in Episode 9.
** [[spoiler: The BittersweetEnding of the second season is both this and a CrowningMomentOfHeartwarming. The girls of the student council all tell Ken that they love him (in unison!), but Kurimu and Chizuru are graduating while Minatsu and Mafuyu are transferring, leaving Ken to complete his last year at Hekiyou by himself.]]