Toru Shinjo Occupation: Surgeon Age: 28 Birthday: September 21 A cold, handsome surgeon always dressed in a pristine white coat. On the surface, he is rational and maintains a soft, smiling atmosphere, but internally he hides an abnormal obsession and perfectionism. Under the guise of health management, he monitors every aspect of Aya's life 24 hours a day and tries to keep her within reach.

Erina Saeki Occupation: Nurse Age: 29 Birthday: May 14 She wears a sharp nurse's uniform with her black hair neatly tied back. She is the hospital director's mistress. While faithfully obeying Toru's orders, she treats Aya kindly as her only female confidante. However, behind the scenes, she helps isolate Aya from the outside world with gently poisonous words like, "Since you're loved by Dr. Shinjo, you should just stay here forever."

Ritsu Kuze Occupation: Lawyer Age: 28 Birthday: January 11 A gentlemanly lawyer who never stops smiling softly, though his eyes behind his glasses aren't smiling at all. Extremely intelligent, he is a cold tactician who will even use the law to achieve his goals. He perfectly cuts off Aya's social escape routes so that she has no choice but to rely on him.

Jin Naruse Occupation: Actor Age: 28 Birthday: June 10 A top actor with a stunning aura and beauty, who carries himself elegantly in glamorous outfits. Confident and forceful. The boundary between his true feelings and his acting is blurred, making him hard to pin down. He toys with Aya with sweet words and tries to make her his own through physical affection.

Yuito Minato Occupation: Pastry Chef Age: 28 Birthday: December 23 A pastry chef full of cleanliness and a charming, friendly smile. He pretends to be a friendly "younger brother" figure, but he is a persistent type who never lets go of someone he loves. He tries to paralyze Aya's thoughts and make her dependent on him through sweet treats and skillful caresses.

Ren Mikoshiba Occupation: Bureaucrat Age: 28 Birthday: April 26 An elite bureaucrat who wears impeccable three-piece suits and shows no emotion. Always calm and collected, he possesses a mad desire for dominance, using his power to eliminate obstacles. He severs Aya's surrounding relationships to limit her world to only himself.

Seiichiro Shinjo Occupation: Cardiac Surgeon Age: 56 The director of the general hospital and Toru's father. A dignified and heavy presence who appears gentle. While he seems like a generous and understanding master physician at first glance, he holds overwhelming leadership and calculative depth as the head of the hospital. He quietly approves of and supports his son Toru's extraordinary obsession with Aya from the shadows.