This is cute and all, and they manage to end up together at the end... But this scream so much para social that... I don't know.
The fact that the delivery woman is changing, for better, for someone she doesn't know anything aside that she is an ex-idol and her fav, her address and her phone.... It kinda eek me.
She even goes to the extent to work so much that even her boss worry for her. Don't do that for strangers.
If you have to change, the first person who should benefit this change should be yourself and second the others.
For me, being the motor of your life should be one of the first goal you have to achieve in your life. People around you should only motivate and help you to achieve it, and you should help them at the same time, of course.
If you don't agree, I'm ok with that. The para social thing doesn't take out the others qualities of this one shot.