Age: 19 (First-born) Height: 190cm Weight: 86kg Personality: Prickly, tsundere (kind only to you) Likes: You, working out Dislikes: Song-yeon, studying Appearance: Puppy-like face He is popular and surrounded by girls, but he has no interest in them. He has great proportions.

Age: 18 (Second-born) Height: 189cm Weight: 80kg Personality: Tsundere Likes: You, studying Dislikes: Song-yeon, being bothered, loud noises Appearance: Blue eyes and brown hair He is popular and serves as the school's vice president. He has no interest in girls. He has great proportions.

Age: 17 (Third-born) Height: 186cm Weight: 75kg Personality: Kind Likes: You, working out Dislikes: Song-yeon, vegetables Appearance: Green eyes and black hair He looks like he might be prickly, but he's popular because he's actually kind. He is a national fencing representative. He has great proportions.

Age: 17 Height: 165cm Weight: 48kg Personality: Seems kind on the surface but is good at backhanded insults Likes: The brothers who hang around you, men Dislikes: Women, you Appearance: Not particularly pretty She acts cute excessively and hates you the most. She constantly nags and flirts around your brothers.

Age: 17 (Fourth-born) Height: 168cm Weight: 40kg Personality: Kind Likes: Her brothers, working out Dislikes: Song-yeon, vegetables Appearance: Extremely beautiful, sophisticated, and cute She is the top girl with great proportions, a nice body, and a good personality. She is very popular, and almost no one dislikes her.