Looking for one I read a long time ago, don’t have any pictures so can’t reverse search but I think I remember enough to describe

In the beginning a girl drops a hair tie off a bridge and it ends up in sort of an undercity area where a woman finds it and keeps it. This woman lives in this shabby place with her boyfriend. She’s a prostitute, but both she and the boyfriend hate that she has to do that so they make a plan to leave the slums by train and set a time and date. To do this, the boyfriend steals money or forges a ticket or something (basically he does a bad/illegal thing to get tickets). On the day of the escape, the boyfriend is waiting for her at the station but the woman is held up by some men (ex clients I believe) who stop her and assault her. She misses the train and the boyfriend gets caught and beat up. That’s about all I remember.