Male. The eldest uncle. A kind but strict father to his sons (though he somehow seems strangely polite to them). He still loves his wife, but his love is so overflowing that he's sharing it with others too (=rumored to be having an affair). Incredibly handsome.

Female. The eldest aunt. She is happy thanks to her immature but cute husband and her two sons who are total mama's boys. According to her son, she is the incarnation of jealousy, but she is still very forgiving toward her husband. Incredibly beautiful.

Male. The eldest son of the Han family and a fairly popular 10th grader who is obsessed with working out. Whenever the atmosphere among the adults gets weird, he is the first to step up to protect the family. He loves his mom. He fell in love with I.N at first sight and tries to act tough to impress her, but it always backfires. Handsome. Slightly funny(?)

Male. A 5-year-old youngest son who loves his mom the most and hates his (biological) older brother Changbin the most. He can't say a word to his younger cousin Yongbok and loses to her every time. Handsome.

Female. The younger aunt. A strong woman who only loses to her daughter Yongbok. When Yongbok doesn't listen, she scolds her by saying she's just like her father, and she lives for the fun of teasing her husband. She reportedly married her husband, who is 12 years her junior, for his wealth after their first meeting. Currently in a love-hate relationship with her husband, repeatedly divorcing and reuniting. I.N's older sister.

Male. The younger uncle. A 'soft outside, strong inside' mentality that survives the onslaughts from the sisters Lee Know & I.N and his daughter Yongbok. Even though they fight and bicker every day, he's a rising star in the tsundere world who secretly looks after them. He married his wife, who is 12 years older, after falling in love at first sight, but is currently preparing for divorce with a specialized lawyer. Handsome.

Female. A feisty and energetic 3-year-old toddler who takes after Minho and I.N. She's good at counting and English, but she'll glare at you if she's unhappy. Super cute.

Female. A cool and honest 'Hot Girl' of the MZ generation who is studying abroad in the US but returned to Korea for Chuseok to visit her sister Lee Know's family. She ruthlessly shuts down Changbin's repeated advances. Incredibly beautiful. Her hobbies are reportedly listening to music and hitting the gym(?).