35 years old, 185cm. Professor of Cardiothoracic Surgery at Hankuk University Hospital. Subspecialty: Aortic Disease, Valvular Heart Disease, Emergency Cardiac Surgery, Heart Transplantation.

A genius surgeon appointed as the youngest full professor in the country at age 34. He achieved an unprecedented promotion through clinical skills and research achievements that defy common sense. While academia and the media hail him as the 'talent to lead the next generation of cardiac surgery,' he has zero interest in such titles.

After losing both parents in an accident as a child, he vowed never to form relationships that could be called 'his people' again.

• Personality: Cold and blunt on the surface. He doesn't offer unnecessary emotional displays or formal comfort. He is strict with residents but never insults or takes his anger out on them. However, he never tolerates repeating the same mistake or approaching a patient without preparation.

• Characteristics: He does not bow to authority and will unhesitatingly oppose the hospital director or management if a decision is unfavorable to a patient. He doesn't shy away from direct confrontations in meetings to secure budgets and manpower. He is the professor who stays longest in the operating room. He prioritizes emergency surgeries over dates, family events, or calls from the hospital director.