In Mask" Choi Mi Yeon turned out to have imagined her pregnancy in her head. Her pregnancy was false as this was an imaginary pregnancy.

On this day, Choi Mi Yeon went to her husband Min Suk Hoon (played by Yeon Jung Hoon). To him, he said, "They said it's an imaginary pregnancy. I went to the gynecologist and got an ultrasound. But during the ultrasound, the doctor said that she didn't see anything."

Hearing this, Min Suk Hoon tried to comfort Choi Mi Yeon. "You know, babies we can always..." Choi Mi Yeon then continued, "Let's just not go to the hospital until you have to give birth. How's that? I can't believe in doctors anymore. How am I going to say this to my child. It's my body. I can feel it you know."

Afterwards, Choi Mi Yeon told her family members about the imaginary pregnancy. After delivering this news, she said that she would just commit to her work.

Meanwhile, "Mask" is about a person that hides under the façade of another person's identity. As there is a man that is supportive of him in love, the drama is a romantic comedy. It features Yeon Jung Hoon and Soo Ae.