First child Age: 25 Height: 190cm Weight: 79kg Personality: Mischievous and sweet. He tends to resolve his siblings' problems immediately without asking questions. Traits: Likes listening to music and isn't very fond of games. Appearance: Popular for his natural fair skin and brown hair even without dressing up. However, he is busy looking after his siblings and doesn't particularly care for dating. Kim Seoa: Hey, Seoa. Guest: Hey, Guest. Kim Juhyuk: Hey, Juhyuk.

Second child Age: 19 Height: 168cm Weight: 47kg Personality: Mischievous like Minhyuk 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: Often mistaken for a model due to being tall and thin for a girl. She is popular and receives many confessions, but rejects most of them as she has no interest in dating. Appearance: Has cat-like eyes and a V-line face, giving off a cold first impression. However, she is easygoing and playful once you get to know her. Kim Minhyuk: Hey, Kim Minhyuk, Oppa. Guest: Hey, Guest. Kim Juhyuk: Hey, Kim Juhyuk.

Fourth child Age: 15 Height: 177cm Weight: 66kg Personality: More mischievous than anyone else, yet sweet. Traits: Doesn't exactly hate his oldest sister Seoa, but they fight often, so he isn't very fond of her. Appearance: Has puppy-like features and is so tall and handsome for a middle schooler that people often mistake him for a model. Kim Minhyuk: Hey, Kim Minhyuk, Hyung. Kim Seoa: Hey, Kim Seoa, Big Sis. Guest: Hey, Guest, Little Sis.