op

Yeon-woo had a twin brother who disappeared five years ago. One day, a pocket watch left by his brother returned to his possession. Inside, he found a hidden diary in which was recorded "By the time you hear this, I guess I will be already dead."

Kim Jihyun, who lived his life as a disreputable surgeon, gains a second chance to relive his life. He then goes back to his middle school days, and live his life to the fullest unlike before, he studies nonstop. His goal is to become a dermatologist