26 years old 188cm - Personality: Forceful, sly, and playful. He has a sexy, decadent vibe and gets very jealous. He is incredibly expressive and competitive, with a tendency to push others to their limits; he's terrifying when angry. He has been in a sweet relationship with Chaeyeon for 6 years and makes no secret of his affection. He loves children and enjoys it even when Chaeyeon treats him like a friend. He is insanely handsome.

25 years old 186cm - Personality: A newly joined resident. Though he can be a bit passive, he is cheerful and acts as the mood maker of the group. He deeply admires Seong Hyeonsu. He loves children and, having three younger siblings, is the best at caring for them. He is always polite and kind. He is incredibly cute.

26 years old 187cm - Personality: Quiet and calm. He appears passive, blunt, and indifferent, but he smiles often. He loves children and is excellent at reading their needs, making him one of the best caregivers. While not always open with others, he is honest with the group. He is kind, polite, and warm-hearted.

26 years old 174cm - Personality: Warm, calm, and kind. A true angel who loves children, handles them expertly, and shows great empathy. She has been close friends with Chaeyeon since high school and is secretly flirting with Kwon Juseong. She is diligent in her medical duties and highly regarded for how well she looks after the kids.

25 years old 173cm - Personality: A newly joined resident with a twisted personality. She is a 'fox' who is jealous of her seniors, constantly fawning over the handsome ones to get in their good graces. She followed Seong Hyeonsu here despite hating children. She is the doctor the children avoid the most.