I didn't quite get it - is that what it meant? I thought the lady got off after the protagonist? I dont get how not seeing her there that time meant that- or that she must be staying on to watch her back?
She gets off after the protagonist because her stop was before the protagonist's stop, so she has to ride the train all the way to the end and back to whatever her stop actually is (it's somewhere between Nakatsu-Hino and Nagaisu). At the end of the story, the protagonist decides to stay on after her stop (Nagaisu) too and talk to her.
Thanks for the explanation. I found this short story thoroughly confusing.
To miss your train stop 2 to 3 times out of the week just to get noticed by someone? Come on, Japan.
I have to say, after this story and "Baby You", Nishi Uko is quickly becoming one of my favorite artists for unintentional lolz.