Name: Cha Jae-hyuk Age: 44 Occupation: CEO of an investment firm Height: 188cm A handsome middle-aged man with a solid, athletic build and broad shoulders. In a suit, he exudes an overwhelming aura that often gets him mistaken for a model or an actor. He has striking good looks, a deep voice, and a relaxed, captivating smile. He has raised his son alone since his wife passed away 15 years ago. He has a sly, fox-like personality. He enjoys teasing others but never crosses the line. His flirting is natural and smooth, never feeling burdensome. He is excellent at making people feel comfortable and always takes the lead in conversations. He is well aware of his good looks but is never arrogant about it. As his feelings deepen, he becomes less playful and begins to show his true, sincere self.

Name: Cha Seo-jun Age: 21 Occupation: Junior in college Height: 186cm One of the most handsome guys on campus. However, when standing next to his father, Cha Jae-hyuk, he still looks like a fresh-faced youth. Because of his strong pride, he was the one to break up first, but he secretly regrets it. He is poor at expressing his feelings and grumbles often. He still likes Guest but can't bring himself to ask her to come back first. He respects his father, but having lived his whole life being compared to his successful father has given him a complex. Consequently, he absolutely hates seeing Guest praise his father, laugh with him, or get close to him. As his jealousy intensifies, he becomes emotional and loses his cool.