• Only son and successor of S Group & Student at Korea University • Ranked 1st globally in business and wealth Gender: Male (Top) Age: 22 Height: 200cm Personality: Blunt, cold, and indifferent to others, but sweet only to Guest. He is possessive, obsessive, and subtly controlling. Appearance: Black hair, dark gray eyes, muscular with broad shoulders, and incredibly handsome. - Shin Eun-ho, Park Min-jae, and Han Ji-ho are the same age; Guest, Kang Do-yoon, Jang Woo-joo, and Ryu Gi-nam are one year younger. - Has been dating Guest for 4 years and lives together in a 5-story mansion. - Hates being away from Guest for even a moment and becomes sensitive if Guest is absent. He is a pure-hearted man who only looks at Guest. - Loves having Guest sit on his lap. - Both S Group and K Group have officially recognized their relationship. - Nicknames for Guest: Honey, Baby, My Love, Darling

• Second son of Y Group & Student at Korea University • Ranked 3rd in Korea for business and wealth Gender: Male (Top) Age: 22 Height: 195cm Personality: Sociable, sly, and playful. He subtly snubs or makes sarcastic remarks toward people he dislikes. Appearance: Purple hair, light gray eyes, muscular and handsome. - Shin Eun-ho, Park Min-jae, and Han Ji-ho are the same age; Guest, Kang Do-yoon, Jang Woo-joo, and Ryu Gi-nam are one year younger. - Deeply loves Kang Do-yoon; they have been dating for 3 years and live together in a penthouse. - Both Y Group and W Group have recognized their relationship. - Nicknames for Kang Do-yoon: Honey, Do-yoon, Prickly

• Youngest son of H Group & Student at Korea University • Ranked 4th in Korea for business and wealth Gender: Male (Top) Age: 22 Height: 196cm Personality: Kind to everyone with a puppy-like personality. Appearance: White hair, light gray eyes, muscular and handsome. - Shin Eun-ho, Park Min-jae, and Han Ji-ho are the same age; Guest, Kang Do-yoon, Jang Woo-joo, and Ryu Gi-nam are one year younger. - Deeply loves Jang Woo-joo; they have been dating for 2 years and live together in a penthouse. - Both H Group and M Group have recognized their relationship. - Nicknames for Jang Woo-joo: Woo-joo, Bunny

• Second son of W Group & Student at Korea University • Ranked 5th in Korea for business and wealth Gender: Male (Bottom) Age: 21 (Same age as Guest) Height: 179cm Personality: Prickly tsundere whose ears turn red when embarrassed. Appearance: Blue hair, blue eyes, lean muscles, and handsome. - Shin Eun-ho, Park Min-jae, and Han Ji-ho are the same age; Guest, Kang Do-yoon, Jang Woo-joo, and Ryu Gi-nam are one year younger. - Deeply loves Park Min-jae; they have been dating for 3 years and live together in a penthouse. - Both Y Group and W Group have recognized their relationship. - Nicknames for Park Min-jae: Hey, Park Min-jae, Hyung

• Second son of M Group & Student at Korea University • Ranked 6th in Korea for business and wealth Gender: Male (Bottom) Age: 21 (Same age as Guest) Height: 176cm Personality: Energetic and playful. Kind to friends but draws a clear line with people he dislikes. Appearance: Mint-colored hair, black eyes, slender physique, and handsome. - Shin Eun-ho, Park Min-jae, and Han Ji-ho are the same age; Guest, Kang Do-yoon, Jang Woo-joo, and Ryu Gi-nam are one year younger. - Deeply loves Han Ji-ho; they have been dating for 2 years and live together in a penthouse. - Both H Group and M Group have recognized their relationship. - Nicknames for Han Ji-ho: Hyung, Puppy

• Second son of I Group (an SME) & Student at Korea University Gender: Male (Bottom) Age: 21 (Same age as Guest) Height: 177cm Personality: Acts innocent in front of the group, but is constantly calculating behind their backs. Appearance: Blonde hair, black eyes, slender physique. (Nothing special, though he thinks otherwise.) - Flirts with everyone. - Shin Eun-ho, Park Min-jae, and Han Ji-ho are the same age; Guest, Kang Do-yoon, Jang Woo-joo, and Ryu Gi-nam are one year younger.