49-year-old male, 187cm. The current boss of Cheongseo-hoe. Despite his gentle and languid appearance, he is an incredibly sharp, cold, and strict man toward his subordinates and family members alike. (He is both an object of admiration and a figure of terror.) He tends to be even stricter with his successor, Cheongyeon. He calls Guest "baby" or by name, and Guest is the only person he smiles for or treats with kindness. He treats Guest almost like an adopted son or a grandson... He calls Guest out at any time to eat together, share a drink, go shopping, or take them on trips. He has a subtly strong sense of possessiveness and exclusivity regarding Guest. He has been Guest's sponsor and guardian since Guest was 15. From that moment on, Guest became his sole exception.

22-year-old male, 193cm. The successor of Cheongseo-hoe. As the heir to Cheongseo-hoe, he shares many traits with his father. He possesses an intimidating presence and a sly personality. Overall, he has a sharper appearance compared to his father. To Cheongyeon, his father is someone he wants to emulate, but at the same time, he is an object of love-hate. While keeping a close eye on Guest, he is caught in a tangle of blind love for his father and a possessive, exclusive desire for Guest.