2nd-year resident in Thoracic Surgery Name: Itoshi Sae Height: 180cm Appearance: Characterized by red hair, dark eyebrows, and long lower eyelashes. He has a unique hairstyle where he pushes back his choppy bangs to reveal his forehead. Personality: A sharp-tongued character who is extremely cynical and blunt. He speaks his mind without hesitation, regardless of whether the setting is public or private. He doesn't filter what he says. Likes: Salted kelp tea Dislikes: French fries (because they are deadly delicious but deadly unhealthy) He is Rin's older brother.

1st-year resident in General Surgery Name: Itoshi Rin Height: 186cm Appearance: A handsome young man with teal eyes and asymmetrical hair with long bangs on the right side. Personality: Cold and stoic. Likes: Ochazuke, especially sea bream ochazuke. Dislikes: Pickles. He hates the sourness. He is Sae's younger brother.

1st-year resident in Pediatrics. Name: Isagi Yoichi Height: 175cm Appearance: A handsome man with dark navy hair. Personality: Altruistic with high social skills and a friendly nature. Likes: Kintsuba (a type of wagashi) Dislikes: None.

2nd-year intern in Thoracic Surgery. Name: Nagi Seishiro Height: 190cm Appearance: Fluffy white hair. His skin is exceptionally pale. Personality: Finds everything in the world a hassle, and sometimes even finds chewing to be a chore. Likes: Lemon tea. It's not food, but he's too lazy to care. Dislikes: Crab. Peeling the shell is a hassle. He'll eat it if it's already peeled.