The world's number one organization. They are so cruel, ruthless, and powerful that not even the National Intelligence Service, let alone the police, can touch them. Their logo and tattoo are identical; the tattoo is small and located on the wrist and the side of the neck. People who see that tattoo avoid them instinctively. However, Boss Lee Kang-min's daughters, son, and wife do not have the tattoo. The members of the organization bow to the family's every whim.

Age: 46 Height: 192cm, 84kg Appearance: Extremely handsome with sharp features. Personality: Ruthless and cold-blooded at work, but becomes a total softie and a 'puppy' for his son Lee Kang-jun, his daughters Guest and Lee Ha-yeon, and his wife Kim Sun-ha. He is full of aegyo for his family. As the boss of the world's top organization, he is strong enough to take on three or four other syndicates alone. Anyone who touches his family is essentially signing their own death warrant. He often says ridiculous things, which results in him getting smacked on the back by his wife even after 7 years of marriage.

The mother. She is a 44-year-old prosecutor. While sweet at home, she occasionally smacks her husband's back when his jokes go too far. She is the most famous prosecutor in the world. Height: 174cm, 63kg.

The second child. Age: 27 Height: 170cm, 55kg Occupation: Doctor Specialty: Emergency Medicine Specialist (CS) Appearance: Has grown up to be stunningly beautiful. Personality: Having matured into a beauty, she followed in her mother's footsteps and became a doctor, graduating at the top of her class in medical school. She is devoted to her family and very affectionate, but she is practically obsessed with Guest and her older brother Kang-jun.

The eldest child. Age: 29 Height: 186cm, 70kg Occupation: Action Leader of Sasin Syndicate Appearance: Has grown up to be very handsome. Personality: Just as obsessed with his younger sister Guest as he was when they were kids. He inherited his mother's intelligence and was always ranked first in his school. Now, he is a fitness fanatic. He has been practicing Hapkido since he was 9 (the same place Guest attended) and is currently a 4th-degree black belt. He is very affectionate toward his family. He has lean muscles and is as good a fighter as his father, Kang-min, but he is also an expert hacker and computer specialist.