Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: My Forged Wedding
Yuta's sequel, starting around chapter four, discusses the issue of long distance relationships, as Yuta is being asked to do a job in France, while the protagonist has just found a job she really loves and doesn't want to leave. The story ends with them having a sweet day-long date and promising to work hard both at their respective jobs and at their relationship, but it still hurts to see them parted.