The Secret of My Love is a 2017 South Korean television series starring Song Chang-eui, Kang Se-jung, Kim Da-hyun, and Park Jung-ah. Plot : A man desperately wants to be "real," so he puts on a "real" mask. A woman wants to be loved so much that she throws out her younger sister and replaces her. The drama shows the struggles of these two, man and woman, who look for ways to find true happiness in their lives.