What does the text in Miho's chat window say? Some forum theories say it's something like this:
hi piro
how did things go between you and nanasawa-san yesterday?
she looks like she is worried about something
i saw her walk into the coffee shop
i grew concerned when several people followed her in
talk to me piro. i think this could be serious

Piro speaks:
for those of you who were able to discern the tiny little writing, i would not consider what is typed there as canon. It's filler. What miho actually says will be different, that was just a tack at it, and quite obviously not polished at all. Don't go over analyzing things based on that text.