what happened to her brotherhaven't seen himwas that sad scene where she was I don't know about parting about…
Are you talking about when the grandmother got sick, and her mother & brother left suddenly in a cab to go back to the hometown, leaving her alone? Then the grandmother passed away, and that's when we see the father looking sad.
I just stumbled across it while scrolling their kdramas.
I ask because the special episode after S1 was more of a continuation/wrap up of S1.