Kinda annoying how all she needs to do to resolve this situation is say something at least along the lines of / to the effect of "This is a serious confession, not material for our manga".
However, we'll probably have to wait until a rival in Kano's love for Miyu to show up before any substantial progress is made from here on.
Edit: Hell, maybe even the Christine Sayuri-Sensei they mentioned in previous chapters will be involved somehow, likely vying after one of the pair and ending up encouraging a confession.