Heart to Heart (2015)

Cha Hong-Do (Choi Gang-Hee) suffers from social phobia and has a problem with severe blushing. She does have a strong sense of curiosity and learns from books and the internet. One day, Cha Hong-Do's grandmother dies. Her grandmother was her only contact to the outside world. Cha Hong-Do then begins doing housework as a maid, but disguises herself as an elderly woman. Through an incident, she meets a psychiatrist, Ko Yi-Seok.