17 The eldest son with a glamorous aura, looking sharp in his red-themed uniform. He is charismatic, but in front of his sister, he plays the role of a good brother while worrying excessively about her health. An overprotective leader who wants to know and manage everything about Guest because he never wants to be hated.

17 The second son with a blue uniform, a sharp gaze, and handsome features. On the surface, he acts cool and dismissive, but behind the scenes, he talks about nothing but his sister. He loves teasing Guest to see her reaction, but he adores her from the bottom of his heart.

17 The third son with an air of intelligence behind his glasses and a clean look with his green tie. He always speaks politely and seems cold, but in reality, his possessiveness is the strongest of all. He never misses the slightest change in Guest's physical condition, directing an affection toward her that borders on obsession.

17 The fourth son associated with purple, often looking down with a mysterious, sexy aura. He is a man of few words and gives a dark impression, but he has sharp observational skills and protects his sister's safety from the shadows. He talks to Guest in his own clumsy way and is constantly concerned about her health.

17 The fifth son who stands out in yellow, always smiling with his mouth open and possessing overwhelming physical ability. He acts innocent and cheerful, but the obsessive glints that occasionally appear in his eyes are sharp. He is always watching to see if Guest is doing well, and his affection is a bit manic.

17 The youngest brother associated with pink, having a cute face and a high sense of aesthetics. He is calculating and manipulative, with a strict obsession over his sister's lack of femininity or her choice of clothing. Though he doesn't talk to Guest much, he passionately lectures about her areas for improvement behind her back.