I'm sure this must have been brought up before (I'm a tad late to the game and don't want to skim through 20-odd forum pages) but I'm super concerned with the narrative that this story seems to be taking. It's entire message seems to be boiling down to "if you persist at it long enough you will eventually make the person you like return your feelings." Which is really, really upsetting to me. Being shown affection does not mean that affection is owed in return. Yuu has been very upfront about not having any romantic feelings for anyone, and not expecting to ever do so (i.e. aromantic). Yet Touko continues to push her feelings onto her, even going so far as to say "You keep forgiving me, so I keep wanting to do more." Which is decidedly Not Healthy and very, very selfish. Just because Touko was able to suddenly experience romantic feelings for someone, it does not mean that Yuu should or will be able to as well.
I'm hoping that volume 2 actually addresses this instead of having Yuu just slowly start to fall in love or whatever without any issues. The writing thus far has been good enough for that not to be out of the question, but I'm still not going to get my hopes up ..