Trust me, it does. A real kimono is longer than one is tall. You lift it so that the bottom just touches the top of your feet, and then wrap it. A koshihimo is then tied around, just above your hips, and the extra fabric is allowed to fall over this line. When the obi is tied later, it leaves this fold of fabric under the obi. It looks just like Temari's. I've seen girls wear yukata this short, with the fold (I've done it myself).
I'll see if I can find some pictures showing what I mean. An explanation is rather difficult to follow if you have no idea what I'm talking about.
is really helpful. Just scroll down until you find "FAQ for kimono". Scroll down that page, until you find "how to wear kimono". Click this, and look at the pictures. I'll attach the ones I think show it most.
For more info, check out "The book of kimono" by Norio Yamanaka. You might be able to find it at the library. It shows how to wear kimono and explains all the pieces. To get a real yukata that high, like Temari's, involves tying the koshihimo higher and pulling the kimono higher.
Temari's outfit is a little difficult to tell, as the collar certainly looks like a kimono collar, and with the fold it has a similar appearance, but some of the other lines are missing. It might just be a simplification or adaptation. Who wants to draw in all the lines, anyway?