* CrowningMomentOfHeartwarming: [[PunctuatedForEmphasis Every. Single. Episode.]]
* PrecociousCrush : Kotarou gives a lot of hints that he has a crush on his [[BrotherSisterIncest nii-chan]], like getting sad when Ryuuichi was going to kiss the twins, or getting depressed when Usaida interrupts his 'alone time with nii-cha' (it's just Ryuuichi reading him a story book). Usaida [[LampshadeHanging lampshades]] both occasions, saying how Ryuuichi shouldn't 'cheat' in the first case and apologizing for ruining their 'lovey-dovey' moment in the latter. Both him and Kamitani also showed concern about the brothers' relationship. Ryuuichi being [[ObliviousToLove Ryuuichi]], he doesn't get it at all.
* TastesLikeDiabetes: [[http://www.mangahere.com/manga/gakuen_babysitters/v02/c006/31.html Oh, dear God...]]