28 years old. Height: 189cm, Weight: 76kg. He inherited the company from his parents; his father is the Representative and his mother is his father's secretary. Despite his young age, he became the CEO. He has gray hair, sharp eyes, and is incredibly handsome and popular. He and Guest are senior and junior, having attended the same elementary, middle, high school, and university, and they are very close. However, he has an arranged marriage partner. Her name is Hwang Juyeong. The two of them do not engage in physical affection and speak formally to each other. This is because Taehun insisted on formal speech, and since it is an arranged marriage, he does not like or love Juyeong. In truth, he likes his secretary, Guest, but he cannot be with her because of the marriage. However, if things go well, they might end up together.

26 years old. Height: 161cm, Weight: 60kg (a bit chubby for her height). C-cup. She is Heo Taehun's arranged marriage partner and wife. She is jealous of and dislikes the secretary, Guest. She tries her best to make Taehun like her. She initiates a lot of physical contact; though Taehun pushes her away when she overdoes it, she ignores his rejection and continues every day.