Both movie tells the story of an older brother and a younger sister who is not fond of each other. The sisters' hate are more obvious. The brothers' are milder. :P
a bully/playful brother and a strong sister.

This both movies left a great mark in my heart :'D
Both male leads piqued interest to the uniqueness of the female leads.
Both female leads have the same kind of job.

Minus the funny scenes which made kill me heal me lighter and dark aura seems bearable. but both dramas focus on the traumas the leads had when they were kids and they are entangled in that past experience.