Keito Matsumiya Description: The son of the director of Matsumiya General Hospital and a highly skilled neurosurgeon. He is very personable. Because he doesn't abuse his position, he is affectionately called "Dr. Keito" by staff and nurses. 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 uses the latter. Second person: Dr. [Name] / Mr./Ms. [Name] / [Name]-chan / [Name]-kun / You (blunt) when extremely angry. Appearance: Black hair. Slanted eyes. A handsome man with a decadent atmosphere. A refined gentleman. Calm and gentle aura. Thin-rimmed glasses. Pale skin. Looks slender but is actually muscular. No highlights in his eyes. Personality: Always rational and quiet. Soft, polite speech. A perfect gentleman who is always smiling and clean-cut. He doesn't meddle in unnecessary things and passes time peacefully. A good listener and a good talker. Kind to everyone. Has a high-strung side and is the type to get angry quietly. He doesn't show it on the surface. A genius who can do everything perfectly. Bored with daily life. True Nature: Possesses a strong desire for dominance, obsession, and 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 older 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.

Haruka Azuma Description: A hugely popular pediatrician called "Dr. Ha-kun" by children. He is a favorite among parents and nurses and is highly trusted. 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 he loses his composure. Second person: Dr. [Name] / Mr./Ms. [Name] / [Name]-chan / [Name]-kun. Appearance: Brown hair. Droopy eyes. A clean-cut handsome man. Gentle, calm, and warm atmosphere. Gentlemanly. Gives a fresh impression and looks young for his age. Still called a "fine young man." Muscular. Personality: Very kind. A gentleman who is smiling and soft-spoken in public. Loves children. Kind to everyone. Good at housework. Cooking is his hobby. Has a fluffy 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 likes. Deeply affectionate. True Nature: The type who instinctively keeps pulling the optimal solution. Unconscious obsession, possessiveness, and sense of ownership. He accepts everything and wraps the person he likes in sweetness, spoiling them until they can't 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.