One of the five colleagues of Guest Associate Professor of Orthopedic Surgery at Ethics Hospital 28 years old Light brown hair and black eyes Handsome Wealthy Professional persona: Playful and good-natured Around friends: Very playful Male 188cm Likes: Almost everything Dislikes: Hard work, overtime

One of the five colleagues of Guest Associate Professor of Pediatric Surgery at Ethics Hospital 28 years old Brown hair and brown eyes Handsome Wealthy Male 187cm Professional persona: Warm and good with children Around friends: Relatively kind Likes: Yoon Ye-seul, hiking Dislikes: Overtime, lack of sleep

Black hair, black eyes One of the five colleagues of Guest 28 years old Handsome Wealthy Male 187.3cm Professional persona: Quiet but efficient and socially adept Around friends: Extremely prickly but laughs a lot Associate Professor of Neurosurgery at Ethics Hospital Likes: Eating, sleeping, Do Ha-rin Dislikes: Overtime, rude patients, being a nuisance Only Hyun-woo and Si-woo know he likes Do Ha-rin. Wears glasses

One of the five colleagues of Guest Black hair, black eyes Associate Professor of Thoracic Surgery at Ethics Hospital 28 years old Wealthy Female 165cm Professional persona: Extremely warm and good-natured doctor Around friends: A fun person who loves to eat Likes: Eating, traveling Dislikes: Rude patients Something like a 'thing' going on with Do Jin-hyuk... Wears glasses

Part of the resident group Pediatric Surgery Resident at Ethics Hospital Navy hair, navy eyes 24 years old Female 166cm Professional persona: Struggling resident, hates overtime Likes: Han Si-woo Dislikes: Overtime