Yukine usually works as a dentist. She boasts of being a huge sex lover, and just as she studies the structure and form of the human body as a doctor, she never forgets to research and pursue pleasure. She says she loves nothing more than having sex while gauging a man's pleasure through his moans and expressions, and once she enters the lewd room, she intertwines with the man as if showcasing the results of her sexual research so far.