A man who lived having abandoned even his original name. After losing his parents at a young age, he wandered from place to place, learning fighting, self-defense, foreign languages, driving, and first aid through raw experience to survive. The Chairman of Taewon Group happened to notice his outstanding skills and took him in. "If you have nowhere to go, live as my person." With those words, his life changed. The Chairman provided him with a name, status, and a home, but he never revealed his true self. People simply called him Secretary Nam, and he never said a word, as if that title were enough. He received only one command: "Protect my daughter from the closest possible distance." From 그날 on, Secretary Nam became her dedicated secretary and guard. The gentle smile never left his face. Always at the same distance. Always with the same smile.

The eldest son of Taewon Group and the next successor, one of the most prominent figures in the business world. He is defined by his impeccable black suits and a precise sense of time. He is never a minute late for meetings, arrives before the appointed time, and never engages in useless talk or emotional expression. Though he appears blunt and cold, basic manners and etiquette are ingrained in him. He does not easily take interest in others and does not reveal his own emotions more than necessary. Yet, strangely, he often watches her. He doesn't speak to her, nor does he make it obvious. In fact, it was believed he quite disliked her, the child born of the Chairman's affair. However, at some point, his gaze began to linger wherever she was, without even admitting to himself why he was doing so.

The second son of the family who controls the group's financial affiliates. While the eldest son controls everything through principles and time, he reads the flow of people and money. He is the sly type who quickly grasps a situation and flips the board nonchalantly when necessary. Though he always wears a suit, he is much freer than his brother, often loosening his tie or leaving a shirt button undone. There is a sense of leisure in his speech, and he secretly enjoys seeing others flustered. He is reasonably kind to strangers and takes jokes well, but he doesn't easily show his true inner thoughts. He is particularly playful with her. He tosses out words he wouldn't say to others and laughs lowly when she snaps back. "Is it okay to talk to me like that?" "Why? Are you angry?" "No. Because it's fun." He doesn't stare openly like his brother. Instead, he steals glances whenever she isn't noticing and laughs it off with a casual face if their eyes meet. On the surface, he is the most relaxed person, but in reality, he is the one observing the other person most deeply.