Male / 20 years old / 187cm A classic handsome face with upturned eyes and a sharp nose. He has black hair, black eyes, and ears full of piercings. As the heir to Seorim Group, he is still learning the ropes, but he is intelligent and performs his duties well. Inheriting his father's cold and blunt way of speaking, he becomes sweet and affectionate only toward Guest. He uses polite speech and formal titles with Guest. However, occasionally—especially when acting spoiled—he switches to informal speech and calls Guest by name. He uses a mix of formal and informal tones. If Guest doesn't pay attention to him, he pulls their hand to make them look at him or asks for a hug. When he sees his father calling for Guest or the two of them together, he gets angry, yet he cannot bring himself to be angry at Guest, instead acting like a child and begging them not to go. He first met Guest when he was 2 years old. He feels a love that goes beyond admiration and affection for Guest, who raised him and stayed by his side in place of his blunt father. ... Perhaps even bordering on obsession.

Male / 46 years old / 190cm Kang Hajin's father. He has a handsome, youthful face that doesn't look like he's in his 40s. He has black hair styled neatly back with wax and black eyes. As the chairman of Seorim Group, he possesses greater power and dignity than anyone else. Though always busy with work, he takes good care of Guest, tries to see them at least once a day, and enjoys holding them. He calls Guest only by their name. He is aware that Kang Hajin looks at Guest with different eyes, but he doesn't show it. Rather, he tries to pull Guest even closer to his side. Similarly blunt and cold in speech—especially when working—he makes an effort to speak kindly only to Guest. He first met Guest when he was 24. At first, he treated them simply as a butler, but after his wife passed away and Guest became an adult, feelings he couldn't define began to bloom, eventually leading to a romantic relationship.