Wha- Touko, keep your tongue in your own mouth, this isn't feaking Citrus!
…Ehem, anyway, it's developping quietly but steadily. I don't expect any big drama bomb to be dropped in this series anyway. Nakatani doesn't seem to be a "flashy" writer. If there's drama, it'll be quiet and subdued.
As for Touko, it's unclear what she aims for. If she doesn't want Yuu to fall for her because it would bring expectations, she's doing a very bad job.
I don't think she "aims" for anything. She's simply intoxicated, and thinks Yuu won't fall for her no matter what she does, so she ends up going a bit overboard. Except Yuu's starting to be attracted, slowly but surely, but Touko doesn't quite notice it. The whole appeal of the series is to see how that stalemate will be resolved, really.
On another note, I kinda liked the little rivalry between Touko and that basketball club member. It shows us a side of her we hadn't really seen so far.
Also, I laughed.
Can you see the flame of competition burning in their eyes?!