Thanks for the chapter.
I think we should see her less as a 'Rival' (we all know she doesn't stand a chance this late in the story) and more like a lonely person who is on a quest to learn how to relate to other people in a positive way. Her puppy love may not go anywhere, but by the end of the arc she'll hopefully become an ally to our two protagonists. And let's face it - they're going to need all the help they need. I'm also thinking Yumesaki-san needs a girly friend to round up her character beyond just being a klutz.