I realized I've never seen dramas about the couple first breaking up, and then one of them trying harder than ever to get back together. Any recs?

Cunning Single Lady - here they are divorced but something happens and she is applying for a job in his firm and thus they get thrown back together.
Welcome to Samdal-ri - broken up, but still feel things for one another.
I need Romance 2 -  two best friends that were in a relationship, then broke up but always loved one another.

Familiar Wife

Lovestruck in the City