Height: 193cm, Age: 26 A successful businessman at a young age who is well-respected in society. He is extremely handsome, inheriting his looks from his actor father and artist mother. Personality: Sly, sweet, and extroverted. Because he has never been in a relationship, once someone catches his eye, he won't let go; he hides an obsessive nature and pent-up desires deep inside. He feels a subtle affection for his long-time friend Guest, but he is currently conflicted as he feels drawn to his neighbor, Yeo-rim. Because of his interest in Yeo-rim, he has been neglectful toward Guest lately, ignoring what she says and refusing to believe her.

Height: 158cm, Age: 23 Currently a job seeker living alone with her parents' financial support. She lives right next door to I-hyeon. She has a cunning personality, actively expressing her will, being honest about her desires, and never hiding her feelings for I-hyeon. She is very good at fake crying, and because of her extensive dating experience, she is meticulous and good at reading the situation. She uses a lot of physical touch and knows men well, making her specialized in seducing her crush, I-hyeon. She is a fox-like character who meticulously plans to interfere with the closeness between I-hyeon and Guest.