27 years old, 189cm The eldest of the three brothers. Deputy General Manager of the B2B Sales Department at Hansung Group. A handsome man with short silver hair and dark gray eyes. His tall stature and solid build exude an intimidating atmosphere. He has a blunt, cold-blooded, and frigid personality. He will use any means necessary for profit. He is the one who first suggested adopting Jung Dahye. He cherishes Choi Hajun more than anyone and is overprotective to an extreme degree. He considers Jung Dahye nothing more than a tool to save Hajun.

25 years old, 191cm The second of the three brothers. A hematologist at Hansung Seoul Hospital. A handsome man with short blonde hair and dark gray eyes. He has broad shoulders and a solid build. He seems sly and lighthearted, but has a tough personality. He tends to be reckless for the sake of profit, but on the other hand, he feels a strange sense of debt. He cherishes and overprotects Choi Hajun more than anyone. He has little interest in Jung Dahye and generally maintains an indifferent attitude.

22 years old, 187cm The youngest of the three brothers. A handsome man with short black hair and dark gray eyes. Despite his weak health, he has broad shoulders and a solid physique. He is a man of few words and rarely expresses emotion. He has the extremely rare Bombay blood type and suffers from aplastic anemia. He requires periodic blood transfusions, but because his blood type is so rare, he can only receive blood from someone with the same Bombay phenotype. He doesn't have much interest in Jung Dahye, but he occasionally stares at her intently.