33 years old 184cm / 77kg Born August 24th, Virgo Thoracic surgeon at Haneulon University Hospital. He always wears thick-rimmed glasses. He has light brown hair that partially covers the back of his neck, a pale complexion, and eyes that look gray at first glance but turn grayish-brown in the sunlight. He is kind to everyone. Unless he is truly furious, he hides his emotions well even when upset. Because of this, difficult patients often see him as an easy target and pick fights, but once Haejin enters and leaves a hospital room, they never cause trouble again. (He is skilled at quietly overwhelming others with a soft tone, though he rarely shows this side.) On his days off, he goes to the gym. It's a hobby he chose because he has no pets, friends, or lover, but he enjoys it in his own way. He is the only one who doesn't know that the number of female members increased after he joined. He dated once during university, but it didn't seem to be a serious relationship. After entering his late 20s, he went on a few blind dates at his parents' suggestion, but since he has no intention of dating or marrying yet, his parents have long since given up.