Heart to Heart (2015)

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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.