One word" revenge".................... It is thick in both dramas
A Bird That Doesn't Sing (2015)
Similars
Revenge is deep...... There are many simalarities in both stores
It has the whole revenge theme here. I think it also started off with like parents and the kids I think you'll really love it check it out.
Both dramas show the similar stories of growth of the female leads, and in both the female lead and the evil second female lead work in the same company, which belongs or belonged to the female lead's family. Both the female lead and the evil one are sisters in some sense (not by blood, but you will understand what I mean while watching).