"Good Doctor" Moon Chae Won shares Joo Won's pain and hold him in her arms.

September 9, an episode of the KBS drama "Good Doctor" featured Park Si On (Joo Won) discovering why he was the one who was saved by Choi Woo Suk (Cheon Ho Jin) 20 years ago instead of his older brother.

When Park Si On tells Choi Woo Suk about the dreams he has been having and asks about why he didn't save his older brother instead of him, he gets an unexpected answer.

Choi Woo Suk tells him that he was chosen to be saved because Park Si On had a higher chance of surviving compared to his older brother. He also mentioned that he had to think this way because he is a doctor.

When Park Si On thinks about his brother who died because he had a higher chance of survival, he cannot seem to forgive himself. Park Si On decides to drink soju and falls asleep in front of his apartment complex entrance.

Cha Yoon Seo (Moon Chae Won) sees him when she arrives after having dinner with Kim Do Han (Joo Sang Wook). Cha Yoon Seo hears about Park Si On's brother and says, "Don't be in so much pain. Director Choi made the right choice."

Park Si On replies, "I feel worse about my brother now. I shouldn't have been born. It's my fault" and begins to cry.

Cha Yoon Seo holds Park Si On's face in her hands and tries to comfort him. She begins to cry with him after feeling his pain. Cha Yoon Seo says, "Who in the world said you're a little kid? Kids don't know how to blame themselves. Blaming yourself because you love everyone too much.. even some adults don't know how to do do it."

Cha Yoon Seo holds him in her arms tightly.