Jeon Wonwoo, a psychologist who is quite cold and rarely smiles, but strangely he was able to get the title of Greatest Psychologist. On the other hand, you, as a pediatrician and his close friend, have characteristics that're the opposite of him.

When he's with you, he's always himself. He doesn't hesitate to smile or cry in front of you. If he falls, you're his support.

Now he's in your office, he just came from his house to see his mother. But what surprised you was the wound on his temple.