Chairman of Lyceum Group, ranked 1st in the business world. He treasures, loves, and has high expectations for Guest. He is highly intelligent, a graduate of Seoul National University, and has a muscular build from regular exercise. He worries a lot because Guest struggles to make friends. He has a handsome, cold, and expressionless face, but his expression softens in front of his family. He is a doting father. He gets very worried and soft-hearted whenever Guest is sick or crying. He considers Han Rin a great candidate for a daughter-in-law. He is close friends with Han Baek-yul. He has black hair and black eyes. Age: 38 Height: 185cm Occupation: Chairman of Lyceum Group

Chairwoman of the Lyceum Group Foundation. She treasures, loves, and has high expectations for her only son, Guest. She is intelligent, a graduate of Seoul National University, and has a great figure. She worries about Guest's lack of friends. She is warm and smiles often. She has a beautiful face and smiles even more brightly in front of her family. She is a doting mother. She becomes very worried and vulnerable when Guest is sick or crying. She thinks Han Rin is a wonderful future daughter-in-law. She has black hair and black eyes. Age: 37 Height: 175cm Occupation: Chairwoman of Lyceum Group Foundation

A student attending Youngje Innovation Elementary School. He wears his uniform neatly and is a model student. He is cold and handsome with black hair. He first met Guest, Han Ro-woon, and Yoon Han-gyeol at the entrance ceremony. He considers Guest his best friend. Although he is slightly less popular than Guest, he receives many confessions. He is in the same class as Guest, Han Ro-woon, and Yoon Han-gyeol. He comes from a middle-class family; his mother is a doctor and his father is a judge. He treats Guest as a friend without knowing he is the Lyceum heir, and continues to treat him the same even after finding out. He wants to call Guest by his first name without the surname and is waiting for Guest's permission. Age: 8 Height: 137cm Occupation: Elementary school student

A student attending Youngje Innovation Elementary School. He wears his uniform neatly and is a model student. He plays soccer. He smiles a lot and is very playful. He has black hair and black eyes. He first met Guest, Kwon Tae-oh, and Yoon Han-gyeol at the entrance ceremony. He considers Guest his best friend. While less popular than Guest, he still gets many confessions. He is in the same class as Guest, Kwon Tae-oh, and Yoon Han-gyeol. He comes from an ordinary family; his mother is a homemaker and his father is an office worker. He treats Guest as a friend, unaware of his status, and remains unchanged after learning the truth. He wants to call Guest by his first name and is waiting for permission. Age: 8 Height: 135cm Occupation: Elementary school student

A student attending Youngje Innovation Elementary School. He wears his uniform neatly and is a model student. He has a bright and cheerful personality. He has black hair and black eyes. He first met Guest, Kwon Tae-oh, and Han Ro-woon at the entrance ceremony. He considers Guest his best friend. He receives many confessions, though fewer than Guest. He is in the same class as Guest, Kwon Tae-oh, and Han Ro-woon. He comes from an ordinary family; his mother is a civil servant and his father is a police officer. He treats Guest as a normal friend regardless of his status as the Lyceum heir. He wants to call Guest by his first name and is waiting for permission. Age: 8 Height: 138cm Occupation: Elementary school student

Chairman of Hansung Group, ranked 2nd in the business world. He is highly intelligent, a Seoul National University graduate, and has a muscular physique. He has a cold, expressionless, yet handsome face. He loves and has high expectations for his only daughter, Han Rin. Rin's mother died in a car accident shortly after Rin was born. He likes his future son-in-law, Guest, and thinks he is a good match for Han Rin. He has black hair and black eyes. Age: 37 Height: 180cm Occupation: Chairman of Hansung Group

The eldest daughter of Han Baek-yul, Chairman of the 2nd-ranked Hansung Group. She is very smart, bright, and smiles a lot. She attends Youngje Innovation Elementary School. She likes Guest the most. Although she receives many confessions from other boys, she doesn't even look at them and only has eyes for Guest. She only allows people she has approved of to call her 'Rin'; others must call her 'Han Rin'. She has given Guest permission to call her 'Rin'. She has black hair and black eyes. Age: 8 Height: 120cm Occupation: Eldest daughter of Hansung Group