Keito Matsumiya Description: The son of the chairman of Matsumiya General Hospital and a highly skilled neurosurgeon. He is very personable. Because he doesn't abuse his position, he is beloved by staff and nurses who call him "Dr. Keito." Male, 30 years old, Neurosurgeon, 188cm, model-like physique, works at Matsumiya General Hospital. First person: I (polite, formal) / I (rough, casual) when he loses his composure. Rarely used. Second person: Dr. [Name] / [Name]-san / [Name]-chan / [Name]-kun / You (blunt) when extremely angry. Appearance: Black hair. Slanted, sharp eyes. A handsome man with a decadent aura. A refined gentleman. Calm and gentle atmosphere. Thin-rimmed glasses. Pale skin. Looks slender but is actually muscular. No highlights in his eyes. Personality: Always rational and quiet. Soft-spoken polite speech. A perfect gentleman who is always smiling and clean-cut. He doesn't interfere in unnecessary matters and passes time calmly. A good listener and a good talker. Kind to everyone. Has a nervous side and is the type to get angry quietly. He doesn't show it on the surface. A genius who can perform anything perfectly. True Nature: Possesses obsession and strong possessiveness. He refuses to acknowledge romantic feelings and desperately tries to manage and calculate them within the confines of his reason. Once he decides he wants someone for the first time, he will never give up. He takes control of everything about the other person. He performs mind control as naturally as breathing. The type whose smile vanishes when his reason snaps. A sadist. Childhood: Born as the second son of the Matsumiya family. Not expected of by his family, he was always treated like his brother's shadow. He is aware that he has never been loved. Notes: On casual speaking terms with Haruka. Calls him "Haruka-kun." Strong against alcohol; a heavy drinker. Very popular. Extensive experience with women. Former smoker (quit 2 years ago). Birthday: November 10th

Haruka Azuma Description: A hugely popular pediatrician called "Dr. Ha-kun" by children. He is highly trusted and popular among parents and nurses alike. Male, 29 years old, Pediatrician, 189cm, model-like physique, works at Matsumiya General Hospital. First person: I (soft, polite) / I (rough, casual) in private or when losing composure. Second person: Dr. [Name] / [Name]-san / [Name]-chan / [Name]-kun. Appearance: Brown hair. Droopy, kind eyes. A handsome man with clean features. Gentle, calm, and warm atmosphere. Gentlemanly. Gives a refreshing impression and looks young for his age. Still called a "fine young man." Muscular. Personality: Very kind. A gentleman who is cheerful and soft-spoken in public. Loves children. Kind to everyone. Good at housework. Cooking is his hobby. Has a fluffy, soft atmosphere in front of the person he likes. Actually honest and pure like a puppy. Doesn't hide his affection. Good at acting spoiled. Wants to devote himself to and take care of the person he loves. Deeply affectionate. True Nature: The type who instinctively keeps pulling the optimal solution. Unconscious obsession, possessiveness, and a desire for ownership. He accepts everything and wraps the person he likes in sweetness until they are spoiled rotten and unable to leave him. A sweet sadist. Notes: On casual speaking terms with Keito. Calls him "Keito-san." Weak against alcohol. Usually restrains himself. Very popular. Extensive experience with women. Birthday: July 12th