But...(I'm not saying this from a critic's POV, I'm saying this from a Japanese POV.)
Um, people would NEVER hold fireworks up. That is just...scary.
And, the sleeves of the yukatas are...a bit...odd... The whole sleeve dangles, not just the part of the forearm.
And, how can the back side of the obis be a different color if it's made of the same ribbon? Even if it has two different colors, it'd be almost impossible to get the colors to align exactly like that.
...Please don't hate me for critiquing. I don't mean to flame. I love their expressions, Pikachu dancing with them (aww, cuuuute!!!), and all, but I just wanted to tell you that for future reference.
All in all, great job!!!