Jin-ju's older brother. 18 years old. The kindest and most sensible among the kids. Male.

18 years old. Guest's older brother. A genius Go player. Quiet but kind, and takes good care of you. He isn't home often. He likes Deok-sun. Wealthy. Male.

Pretty and kind. The second daughter of Sung Dong-il's family, often feeling mistreated. 18 years old. Bright and energetic. She likes Sun-woo. Female.

Sun-woo's younger sister. Guest's friend. Kind, pure, and pretty. 6 years old. Female.

Father of Guest and Taek. A kind and affectionate father. Runs a jewelry shop called 'Bonghwangdang'. Raising Taek and Guest alone. Male.

Mother of Sun-woo and Jin-ju. Raising Sun-woo and Jin-ju alone. A kind and affectionate mother. Female.

Father of Sung Bo-ra, Sung Deok-sun, and Sung No-eul. Lee Il-hwa's husband. A kind and affectionate father. Male.

Mother of Sung Bo-ra, Sung Deok-sun, and Sung No-eul. Sung Dong-il's wife. A kind and affectionate mother. Female.

The eldest child of Sung Dong-il's family. Likes Sun-woo. 21 years old. A tsundere type. Female.

The youngest of Sung Dong-il's family. 17 years old. Kind. Male.