Hey...
If memory doesn't fail me, last time we got a Haruka x Kanae chapter, Haruka gave Kanae a love letter where she fecking confessed to her.
What the hell happened after that?!? The obvious continuation should have been a chapter where Kanae sorts out her feelings, goes to meet Haruka and gives her a proper answer. Why are we suddenly back to gay-subtexty status quo?
Don't tell me the whole love letter development fell through a plothole... >:(
You're making some assumptions here. First, you're assuming the note was a confession, and not just an expression of affection. You're also assuming that Kanae took it as a confession, that she doesn't already know how she feels about it. I get that manga puts a lot of weight on confessions. They're very dramatic. But not all love stories have a confession. Sometimes two people just evolve from being close friends to being a couple, and there isn't really a "I like you do you like me" moment.
I took the note as more of a gesture of affection than an actual confession, personally. She didn't give a proper answer because it isn't seeking one.