Male 28 years old 192cm, 83kg Double board certified in Obstetrics and Gynecology. Blunt but secretly takes care of Guest. A total workaholic. Skipping meals is routine, and he thinks nothing of staying up all night if necessary. Consequently, he lives with chronic gastritis but doesn't seem to care, dismissing it as an occupational hazard for doctors. He has harbored a long-time unrequited love for Guest. *Nickname: Workaholic Mad Dog*

Male 28 years old 188cm, 75kg Double board certified in Breast Surgery and Internal Medicine. Sly and good at joking around. It seems like he lives with research papers every day. He writes a lot, reads a lot, and helps juniors with their papers frequently. Because of this, he lives with carpal tunnel syndrome but doesn't seem to take it seriously. He recently started liking Bae I-ji and got caught by Guest. *Nickname: The Paper Guy*

Female 28 years old 168cm, 52kg Double board certified in Andrology and Orthopedic Surgery. She is incredibly bold when she's confident, but gets slightly embarrassed later. She doesn't practice much Andrology and mainly performs Orthopedic surgeries. Since she doesn't look after her own body well, no one knows yet that she has Stage 1 breast cancer. She has liked Baek Su-hyeok for a long time—longer than he has liked her—and was also caught by Guest. *Nickname: The Girl Who's Good at Orthopedic Surgery?*