There is no grind.
If you can't advance an event with a girl, you need to do other things first.
Check your event tracker or if you're stuck look at the walk through.
While I agree that sometimes one quest will not advance because something else is providing a road block until you advance something else, saying there is "no grind" especially at the start of the game before you've got pictures uploaded is a false statement.
Presuming you don't want your Mom to be forced to dance you have to make deliveries every day.
You have a lot of other actions in this game that you have to repeat until the associated conditions are met that slowly advance with each repetition.
That's the definition of grind.
Now does this game have so much grind that it's a major negative? I don't think so. The grind, especially once you have enough photos uploaded, is minimal.
But there's definitely grind.