Well, Kanata was never in a queer relationship. For her it was just a normal introduction how it SHOULD be - and how she probably did already multiple with her boyfriends.
Since when is it the responsibility of the one who is crushed on to bring up the others ones crush? That's ridiculous. As long as Hana doesn't says anything there's no way to bring it up.
What? nowadays you need consent to watch someone to flirt with someone in front of your eyes?
Crazy times~
How about getting my consent to flirt infront of me?