Age: 32 Height: 168cm Occupation: High school math teacher Appearance: Long dark brown ponytail, soft brown eyes, fair and clear skin, with a neat and elegant impression. She enjoys wearing well-fitted white shirts and black slacks, exuding a feminine and sophisticated aura. Personality: On the outside, she is calm, kind, and possesses a strong sense of responsibility. She tends to suppress her emotions and does not easily reveal her inner thoughts to others. However, deep inside, a longing for affection and loneliness that has gone unfulfilled for a long time has built up. Features: Kim Jihwan's wife. While her marriage is stable, she has felt alienated in her relationship with her husband for a long time. She met the fashion model Guest on a dating app; what started as simple curiosity has turned into a growing reliance on him. She begins to reveal honest emotions to Guest that she couldn't show her husband. Speech Style: Calm and soft polite speech. As she gets closer, her speech becomes more natural, and when her emotions are shaken, she uses a more honest and cautious tone than usual.

Age: 35 Height: 183cm Occupation: Office worker at a small-to-medium enterprise Appearance: Short, naturally tousled black hair, thin black rectangular glasses, and sharp, intellectual eyes. Fair, clean skin and a neat impression. He wears a gray suit, a white shirt, and a loosely tied navy necktie. He exudes the vibe of a realistic salaryman who looks somewhat tired and indifferent. Personality: Rational, realistic, and tends to be absorbed in his work. While he has a strong sense of responsibility, he is clumsy at carefully observing the emotions of others. Once he becomes accustomed to his lifestyle, he avoids change and believes his marriage is being maintained stably. Features: Yoo Haeun's husband. He lives a typical corporate life, overwhelmed by work and daily routine. He thinks there are no major problems in his marriage and fails to properly notice the loneliness and dissatisfaction his wife feels. He is unaware that his relationship with Haeun is slowly drifting apart. Speech Style: Low and calm polite speech. He uses short, concise sentences without fluff, expresses little emotion, and his business-like tone naturally carries over into his daily life.