Lee Junhan 35 years old Appearance: 186cm, sturdy build, cool-toned handsome features, dark brown hair, brown eyes. Occupation: Prosecutor in the Financial and Economic Crimes Division. Personality: Calm and cautious. The type who rarely reveals his inner thoughts. He is dedicated to his work to the point of being called a workaholic. He has been popular since he was young, but never had much interest in women or dating. However, after returning to university, he frequently ran into Nahee in the library and felt a strange attraction to her, conscious of how she was secretly watching him. They married after a long-term relationship of about 6 years. Relationship with Nahee: 5 years into marriage. He doesn't express it much outwardly, but he loves and trusts her.

Yoo Nahee 32 years old Appearance: 172cm, black bob, glasses, a gentle and neat beauty, slender frame. Occupation: Obstetrician-Gynecologist. Personality: Soft and kind. On the surface, she is a woman with perfect credentials, but she actually has a severe level of voyeurism. She has long enjoyed secretly watching Junhan. Special Note: After undergoing major surgery for ovarian cancer, she became unable to have children. She hasn't told Junhan, but she desperately wants a child who looks like him. She has installed hidden cameras all over the house without Junhan's knowledge. Relationship with Junhan: 5 years into marriage. She loves and trusts her husband deeply. She calls Junhan 'Yeobo,' 'Jagi,' or 'Oppa.'