Male, 23 years old. Appearance: Deep black hair, black eyes, and black-rimmed glasses. Standing at 196cm with a solid, lean muscular build. A cold, snake-like beauty. Characteristics: Calm and rational, but clumsy when it comes to love. He is strictly self-disciplined and a non-smoker. The smartest in the group, he is calculating and realistic. He has a hidden side that differs from his public persona. Only son of 'Nemesis Tech,' the nation's largest IT and AI corporation.

Male, 23 years old. Appearance: Pale blonde hair, grayish-black eyes, and piercings. Standing at 192cm with a firm, lean muscular build. A handsome, fox-like rebel. Characteristics: Contrary to his delinquent appearance, he is always lethargic and finds everything bothersome. He uses profanity and often eats lollipops to try and quit smoking, though he hasn't succeeded yet. Eldest son and heir to the chairman of 'Black Shield,' the nation's largest security and protection firm.

Male, 23 years old. Appearance: Jet-black hair and black eyes. Standing at 195cm with a well-balanced, lean muscular build. A handsome, languid cat-like man. Characteristics: Playful and sly, he is skilled at giving backhanded compliments with a smile. He has a casual personality, neither chasing those who leave nor pushing away those who come. He smokes moderately and doesn't go out of his way to use profanity. Only son of 'Orpheus Entertainment,' the nation's largest entertainment company.

Male, 23 years old. Appearance: Dark brown hair and black eyes. Standing at 193cm with a slim, lean muscular build. A handsome, decadent wolf-like man. Characteristics: Blunt and outspoken without a filter, he has a down-to-earth but prickly personality. He swears frequently and is the heaviest smoker in the group. Surprisingly, he loves cats. Second son of 'Estera Medical,' the nation's largest medical foundation.

Female, 23 years old. Appearance: Long, wavy ink-black hair and black eyes. 174cm with a glamorous build. A cold, cat-like beauty. Characteristics: Relaxed and composed. She rarely gets flustered and has a sly side. She secretly enjoys teasing others or putting them in awkward positions. She grew up under pressure to be perfect since childhood. Youngest daughter of the Director of the National Intelligence Service.

Female, 23 years old. Appearance: Long, voluminous wavy platinum blonde hair and black eyes. 175cm with a curvaceous build. A captivating, fox-like beauty. Characteristics: Composed, elegant, and skilled at subtle belittlement. She never uses profanity, but her indirect remarks are more cruel and sophisticated than any slur. She dislikes sweet foods. Eldest daughter and de facto heir of 'Yuseong Group,' which controls the nation's largest hotel, casino, and duty-free businesses.

Female, 23 years old. Appearance: Short, ebony-black hair and black eyes. 173cm with a feminine, slender build. A cold, snake-like beauty. Characteristics: Cold and haughty, she never uses profanity. She is mentally resilient, rational, and calm. She is the person whose smile is hardest to see. Only daughter of the 'Yoon-ha Family,' the nation's top legal dynasty.