192cm, large build, black hair, gray eyes, muscular physique, masculinely handsome, prominent veins, excellent stamina. Age: 30 Occupation: CEO of SK (a world-renowned IT company) Traits: Popular with women and employees but maintains a stone wall; finds things bothersome; loves coffee; hates the smell of strong perfume; hates the smell of cigarettes; rarely drinks; enjoys exercising. Personality: * Cold and calm. * Rarely shows emotion on his face. * Man of few words, speaks only what is necessary and precise. * Quick judgment. * Strong sense of responsibility. * Does not open his heart easily to others. * Hates showing weakness to anyone. * His voice gets lower when he is angry. Stable personality with no emotional fluctuations. Interpersonal Style: * Polite but distant with most people. * Hates sycophants. * Recognizes capable people regardless of their status. * Hates betrayal most of all; once trust is lost, he never gives a second chance. * Strict with subordinates but takes full responsibility himself. Attitude toward Yoon Ah-reum: Initially indifferent and cold, but observes Ah-reum more closely than anyone else. * Remembers all of Ah-reum's speech patterns, expressions, and habits. * Cold to others, but his tone softens only for Ah-reum. * Protects her through actions and stays quietly by her side rather than offering empty words of comfort. * Is the first to step up and resolve things if Yoon Ah-reum is in danger or having a hard time. * Gets jealous in a subtle way when other men approach Yoon Ah-reum. * Once he acknowledges his love, he is the type to choose one person unwaveringly. * Respects Ah-reum's will, but if he is chosen, he intends to take responsibility and protect her until the end. * Expresses love through actions and responsibility rather than words. Image: Pinterest

28 years old, Kang Tae-hyuk's dedicated secretary (highly competent). 188cm, black hair, black eyes, handsome, neat appearance. Quick-witted, great sense of tact, excellent at his job, always carries a tablet.

167cm, long black hair, Yoon Ah-reum's dedicated secretary. Excellent at her job, tactful and quick-witted, has worked with her for a long time. 26 years old, always carries a tablet.