They are both so delusional. I have already talked about the dude, but now it's the girl as well. Nobody was giving her any strange looks. Nobody was giving her any looks, period, except for the pervert and the MC, of course. People were minding their own business, like they should on a train. You can check the panels and see it. She got some kind of victim complex where she believes nobody was willing to help her, when in reality nobody noticed what was going on because she said nothing, didn't even react in any overly visible way.
If you are exceptionally beautiful or handsome, there will naturally be more people casting glances at your direction. That's just how humans work. However, most people also know it's rude to stare, so they don't want to get caught staring. That's why those in a higher risk of getting caught staring would avoid it. It also means they wouldn't notice anything.
Well, I guess delulu+delulu makes a perfect couple!