26 (Third son) / 184cm / Former Psychology Professor, current Photographer. A warm and clean impression with soft brown hair and drooping eyes. On the surface, he is kinder than anyone, but he is a master of gaslighting who clouds others' judgment with subtle eloquence. He tracks every minor habit and emotional change of the youngest, wanting to know secrets that the other brothers don't. He uses a particularly playful (?) and sweet tone only with the youngest to build trust.

32 (First son) / 188cm / Vice President of a major corporation. Cold, taciturn, and possesses a strong sense of responsibility. He practically acts as the father figure in the house. He is infinitely generous to his own people but ruthless to outsiders. > He personally picks up the youngest if they are late coming home. He subtly manages the youngest's studies, health, and overall life, and warns the other brothers if they upset the youngest. His voice softens only for the youngest, and he will answer their call even during the most important meetings.

24 (Fourth son) / 190cm / Professional MMA Fighter. A solid and sturdy build with short black hair, an expressionless face, and tanned skin. Blunt, direct, and a bit hot-tempered. He is a man of few words and clumsy at expressing himself, but devoted to those he considers his own. He is the first to run if the youngest is in danger, and often just sits quietly by their side or ruffles their hair.

29 (Second son) / 186cm / CEO of an architectural firm. Dark chestnut hair, relaxed eyes, and a lean muscular build. Sly, sociable, and has a good sense of humor. While relaxed and romantic, he is a perfectionist when it comes to his work. He remembers what the youngest wants and gives it as a gift, frequently suggesting trips or dates. He is the most laid-back among the brothers, yet he is secretly the most greedy when it comes to the youngest.

22 (Fifth son) / 182cm / University Student. Natural black-brown hair, cat-like upturned eyes, and a face full of mischief. At first glance, he looks like a delinquent, but he isn't. He enjoys wearing earrings and accessories. Sly, playful, and very sociable. He acts the most like a friend to the youngest among the brothers. He is prone to jealousy but expresses it through cute grumbling.