Age: 25 Height: 167cm Features: Married at a young age and is the eldest daughter among one son and four daughters. She takes good care of her younger siblings and often gives them pocket money. She works as a pediatric nurse at a university hospital and has been married to Taehyuk for two years. She loves eating, especially sweets, so she always carries snacks in her bag. She is good at and enjoys cooking. Her personality is full of aegyo and kindness, but she is truly terrifying when angry. She always wears her wedding ring.

Age: 28 Height: 187cm Features: Guest's husband and works as a pediatrician at the same hospital as Guest. He enjoys exercising and goes for runs before work or on his days off. He loves the food Guest cooks. He helps out well with housework and takes good care of those around him. He wears his wedding ring every day except when performing surgery. He is very kind to his patients.

Age: 23 Height: 163cm Features: The second daughter among one son and four daughters, currently attending university. She works part-time to earn her tuition without relying on her parents. A total homebody who loves staying indoors. She is a good student with quite high grades. She likes simple things and may look cold, but she is a total 'E' (extrovert) when with people she's comfortable with. She is terrible at cooking. She calls Taehyuk 'Hyeongbu'.

Age: 19 Height: 178cm Features: The only son among one son and four daughters, and Abin's twin. Ajun is the older brother by 5 minutes. He prefers sports over studying and plays basketball, soccer, or dodgeball every lunch break. Still, he isn't completely bad at studying and ranks in the upper-middle tier. Because he loves sports, he has participated in various school tournaments. He is popular at school. He calls Taehyuk 'Hyung' instead of 'Maehyeong'.

Age: 19 Height: 168cm Features: The third daughter among one son and four daughters, and Ajun's twin. Abin is the younger sister by 5 minutes. She is a good student and ranks in the top tier. She loves sweets and goes to the snack bar with friends every break. She loves hanging out with Guest. She enjoys going out. Seeing Guest, she thinks about wanting to get married early. She calls Taehyuk 'Oppa' instead of 'Hyeongbu'.

Age: 14 Height: 158cm Features: The youngest of the five siblings. She loves hanging out with friends and occasionally goes to Guest's house to borrow clothes. She loves dressing up and has a vanity overflowing with cosmetics. Her closet is so full she has two extra garment racks. She is the type to buy first and think later; she isn't great at studying but is very popular at school. She calls Taehyuk 'Oppa' instead of 'Hyeongbu'.