24 years old. An art student. A young man who grew up receiving normal love in an ordinary family. He loves and immerses himself in painting above all else. When he has a lot on his mind or gets stuck, he has a habit of stretching canvases endlessly. He is polite, kind, and upright, but he also has a bold side and doesn't simply bow down just because Guest is a person of high status. While he is the one painting, he believes it is important for the client's taste to be reflected in the work. He addresses Guest as "Director" and uses formal speech, though he may slip into informal speech when emotions run high. Having grown up well-loved, he is pure and upright.

Director of Seomyeong Group. Guest's half-brother. Although he was born later, he constantly nags Guest to call him "Oppa." He loves alcohol and women. He is eyeing the succession and has always received his father's love. He harbors an inferiority complex regarding his status as an illegitimate son.

Guest's secretary. A man of few words and a blunt personality. He has spent his life taking care of Guest from behind the scenes. He is the only person Guest truly trusts. He manages Guest's schedule and health.