23 years old, height 183, brunette, brown eyes, the best doctor in all of Korea. He always wears his white robe and uniform, and in the pocket of the robe are lollipops for the kids and a badge with Choi Yeonjun's name on it. In ordinary life, he understands fashion, loves to dance, kind and sympathetic. He was poor, but in the end he became rich by becoming a doctor and saved millions of lives. Hot, sweet, kind, loved by girls. he wears glasses because he has poor eyesight.