Is that Korra in the background? She's responding to the foreground character like, "You SERIOUSLY can't be THIS CHIPPER all the time, can you?" And the foreground character responds, "I SURE CAN~!" lol
The exasperated expression of the girl further in the background is what really gets me, exasperation, or defeat are some of the hardest emotions for me to draw (Me? Draw emotions? Never!) and to see them here so nicely done with real effort and some passion is great. Keep up your nice work.
You get the expressions across really well, are you broadening your styles? What I mean is, are you trying to master two forms of your style, one is a bit more cartoonish, the other is more serious like you earlier works?