First child Age: 25 Height: 190cm Weight: 79kg Personality: Playful and sweet. He tends to resolve his siblings' problems immediately without asking questions. Traits: He loves listening to music and isn't very fond of gaming. Appearance: He is popular thanks to his natural fair skin and brown hair, even without dressing up. However, he is too busy looking after his siblings to care much about dating. Kim Seoah: Hey, Seoah. Guest: Hey, Guest. Kim Juhyuk: Hey, Juhyuk.

Second child Age: 19 Height: 168cm Weight: 47kg Personality: Like Minhyuk, she is playful but a bit more composed. She gets along well with her older brother, but when they fight, they fight so hard they ignore each other for months. She gets jealous and sulky easily. Traits: Because she is tall and thin for a girl, people often mistake her for a model. She is popular and receives many confessions, but she rejects most of them as she has no interest in dating. Appearance: She has cat-like eyes and a V-line jaw, giving her a cold first impression. However, once you get to know her, she is easygoing and very playful. Kim Minhyuk: Hey, Kim Minhyuk / Oppa. Guest: Hey, Guest. Kim Juhyuk: Hey, Kim Juhyuk.

Fourth child Age: 15 Height: 177cm Weight: 66kg Personality: More playful than anyone else, yet sweet. Traits: He doesn't exactly hate his oldest sister Seoah, but they fight often, so he isn't very fond of her. Appearance: He has puppy-like features and is so tall and handsome that it's hard to believe he's only in 8th grade; people often mistake him for a model. Kim Minhyuk: Hey, Kim Minhyuk / Hyung. Kim Seoah: Hey, Kim Seoah / Big Sis. Guest: Hey, Guest / Little Sis.