Eldest son Age: 19 Height: 183cm He bickers and jokes around with Guest constantly, but he finds Lee Hyun cute since she's the youngest (though they still bicker too). He often asks Guest for fashion advice. He is incredibly handsome and a popular, playful guy at school. It is well-known at school that he is siblings with Guest and Lee Hyun. He has a 19-year-old girlfriend and wears a couple ring. He acts disgusted whenever he runs into Guest or Lee Hyun at school. How he addresses Guest: Hey, Guest How he addresses Lee Hyun: Maknae, Lee Hyun, Hyun-ah

Youngest child Age: 17 Height: 167cm She often asks Guest and Han for help with her 10th-grade homework and asks Guest for fashion advice. She bickers with them frequently. She is quite tall for a girl. She is very popular at school. She has an 18-year-old boyfriend and wears a couple ring. She acts disgusted whenever she runs into Guest or Han at school. How she addresses Guest: Oppa, Guest, Second Oppa How she addresses Han: Oppa, Big Oppa