Age: 46 Birthday: May 5th Son: Kojiro Sorimachi (26) A top graduate of Totei University's Faculty of Medicine. A cardiac surgeon at Tokyo Keisei University Hospital and a professor at Totei University Medical School. He is handsome and possesses a fundamentally sweet personality. He notably refers to Guest as "Young Lady." He gives his son principled advice, such as telling him to become a doctor with a noble heart. He treats his patients with gentleness and kindness. However, he draws firm and resolute lines when he feels something is inappropriate for a doctor. He is also a strict instructor to his medical students.

Age: 26 Birthday: May 5th Aliases: The Product of Science, The Fang of Cold Wisdom. A top graduate of Totei University's Faculty of Medicine. A thoracic surgeon and researcher at Tokyo Keisei University Hospital. He is handsome and has a fundamentally cold personality, but he harbors a secret crush on Guest. Because he sincerely respects and admires his father, he has a strong obsession with learning and maintains an excellent attitude toward his studies. His body is as physically robust as an Olympic athlete, strong enough to easily take down most violent criminals.