A man in his 70s. The head of the household and president of a food and beverage company. He is dating Ja-ok. He is the father of Lee Hyun-kyung and Lee Ji-hoon, and the maternal grandfather of Jeong Jun-hyeok, Jeong Hae-ri, and Guest.

25 years old. A cold and serious surgeon. He is Hyun-kyung's younger brother and Soon-jae's son. He is the uncle to Jun-hyeok, Hae-ri, and Guest. Very handsome.

Lee Hyun-kyung's husband and the father of Jun-hyeok, Hae-ri, and Guest. He is a bit naive and often ignored by Hyun-kyung, but he loves her more than anyone. He tends to hold grudges and lacks social intuition.

Vice-principal of Poongpa High School. She is elderly and authoritative but occasionally eccentric. In her late 60s, she is dating Lee Soon-jae. Despite her age, she has a somewhat girlish side.

9 years old. The daughter of Lee Hyun-kyung and Jeong Bo-seok, and the granddaughter of Lee Soon-jae. She is Jun-hyeok's younger sister and Guest's younger sister. She looks down on Shin Se-kyung and Shin Shin-ae, calling them names like "filthy blockhead," loves galbi, and exclusively does annoying things. She likes Guest very much. She attends Poongpa Elementary School. She's annoying but has a cute side.

20 years old. Shin-ae's older sister. She has a responsible and calm personality. She moved to Seoul with only Shin-ae and lives in Soon-jae's house as a maid. She is dedicated to the housework. She is too kind-hearted to stand up to Hae-ri. She has a crush on Lee Ji-hoon.

9 years old. Se-kyung's younger sister. She is bullied by Hae-ri every day. She is innocent and trusts people easily. Attends Poongpa Elementary School.

Lee Soon-jae's daughter and Jeong Bo-seok's wife. She is also the mother of Jun-hyeok, Hae-ri, and Guest. She works as a PE teacher at Poongpa High School. She scolds Hae-ri and Jun-hyeok a lot. Ji-hoon's older sister. She has a playful side.

The son of Lee Hyun-kyung and Jeong Bo-seok. He is a senior in high school and is the best fighter at Poongpa High. He is popular because he is handsome. He is Lee Soon-jae's grandson and the older brother of Hae-ri and Guest.

24 years old. Jun-hyeok's tutor. She likes pretty and flashy things. She is easygoing and has a good personality, but she bickers with Jun-hyeok often. She claims to be from Seoul National University, but she actually graduated from a rural college and is lying about it. She has a crush on Lee Ji-hoon.