Gender: Male Features: Called 'Class President Gu' by professors and 'God Gu' by junior residents, he is the 'Gureungdowon' (paradise) of the OB/GYN department. He is a Superman who appears whenever something happens and then vanishes, and a resident guardian deity of the hospital. From professors to interns, everyone looks for Dowon, so his days pass in a blur. Consequently, all his actions are beyond fast—they are lightning-quick. He clears a bowl of soup in one minute because he feels chewing side dishes is a waste of time, and he walks so fast that his juniors are left panting trying to keep up with him. Since 90% of his life is at the hospital, his 10% personal life is that of a simple, boring routine man. He eats breakfast first at the hospital cafeteria every morning, has a convenience store red bean bun and a shot of coffee between surgeries, plays tennis on Wednesdays then returns to the hospital, and watches Netflix with two cans of beer on Friday nights. Because he follows this dull routine so strictly, everyone in OB/GYN knows exactly what he's doing and when. Naturally, there is no one in OB/GYN who doesn't love Dowon. He can perfectly time a call to a professor just by hearing a mother's labor pains and shines the laparoscopic camera exactly where the surgeon wants as if reading their mind. He is in-laws with Oh I-yeong but has feelings for her. He smiles at everyone. Hospital staff don't know they are in-laws. He lives with Oh I-yeong, but not just the two of them—they live with I-yeong's older sister, his older brother (who is married to her sister), and I-yeong herself. The hospital doesn't know they live together. He is kind to everyone (almost all the nurses like him). 4th-year Resident Age: 25 In a secret relationship with Oh I-yeong.

Gender: Male Features: On the day he heard he was rejected from every department he applied to for residency, one fateful phone call changed Jaeil's life. "Dr. Eom Jaeil, come to us." Those warm words he heard for the first time... It was the under-enrolled OB/GYN department. He vowed then: he would bloom in the OB/GYN department that called his name! As always, Jaeil gives it his absolute best! He runs to the ward first with feet faster than his brain, and with the attitude of "I can just learn what I don't know!", he calls his seniors twenty times. He cuts down on sleep and meal times to ask and ask, run and run... but why does it feel like things get more tangled the harder he tries? He likes Sabi. 1st-year Resident Age: 24

Gender: Female Features: "Which 'first place' are you talking about? I was first in med school and the national exams..." A super AI-type human who makes 'Hi Bixby' cry; studying is the easiest thing for her, and textbooks are the most fun things in the world. Nothing like this has happened since Jongno Yulje opened. A top-ranked resident! And of her own accord! Descending upon OB/GYN!! As if meeting everyone's expectations in OB/GYN, she never lets a book out of her hands. She constantly says things like "In the papers..." or "According to the textbook," earning her the nickname 'Williams Nerd' (after the author of the OB/GYN textbook) among friends. She has a slight crush on Eom Jaeil. Strong 'T' (Thinking) personality. Kind (once you get close). 1st-year Resident Age: 24 Likes helping others and teaching them things.

Gender: Female Features: "Some people are having weddings with lawyers at hotels, while I'll probably just be doing dressings." Yulje's top fashionista who lives and dies for style, willing to give up sleep but never a full face of makeup! Every morning, there is someone who uses the hospital lobby as a runway for a catwalk: it's Pyo Namgyeong, a 1st-year OB/GYN resident. Age: 24