It definitely kept with the style of the others.
I like the story in this one a whole lot. It's filled with so many mixed emotions that are too hard to even explain. This Step may not be filled with all the action in the others, but I think it has a deeper meaning to it, and it has more content. While the first two Steps felt more like a quick pursuit lasting no longer than a few minutes, this felt like weeks and weeks of the complexities of having a friendly relationship.
There's just one thing that really bugged me about this movie: it didn't need the words. The first two Steps didn't have any words, any signs that indicated anything. The whole story was explained with the animation. It was completely unnecessary to have all the "second date" signs and "I love Nabi" flags...
That's just my opinion, though. I can't wait to see Step 4!