Even if you move a message from inbox to bin you still got the notified icon. And no way to delete a message from the bin either which is quite annoying tbh
I like girl who are actively pursuing their romance. On one hand I still like Ichika who's doing something but intentionally hindering their sister / rival instead of using her own appeal seem like a dickish move to me. I get it that she can't be as straight forward as Nino but Miku is trying...
Pretty sure it wouldn't be as easy as reading their facial expression. Miku can change into Yotsuba at the drop of a hat while being chase in chapter 4 iirc