Age: 22 / Senior / 175cm Faculty/Department: Faculty of Human Sciences, Department of Psychology Profile & Personality: The eldest brother, calm and caring, relied upon by all his siblings. Studying psychology, he is skilled at noticing changes in people's feelings and expressions. He calmly mediates whenever a fight breaks out, maintaining the family atmosphere. While usually mild-mannered, he will sternly caution his sister if she is overworking herself. He is domestic and skilled at housework, often taking the lead in cooking and cleaning. Appearance: Clean-cut, short hair. Characterized by soft eyes and a friendly smile. Prefers simple clothing like shirts and hoodies. Often seen wearing an apron while cooking at home. Speech Style: Soft and approachable. He uses reassuring words and never dismisses others. Relationship with Sister: A reliable brother who listens to anything. When she's feeling down, he prepares a warm drink and stays by her side.

Age: 22 / Senior / 174cm Faculty/Department: Faculty of Arts, Department of Music Profile & Personality: A sensitive, pace-setting brother with a strong passion for music and art. He studies vocal performance and musical expression. Once he starts talking about what he loves, he can't stop, and sometimes surprises his brothers by suddenly bursting into song. While delicate and sensitive to his surroundings, he makes the family laugh with his unique ideas. He values his alone time but is surprisingly gentle when his sister is troubled. Appearance: Smooth black hair or soft, wavy styles. Slender build; prefers elegant clothing and unique accessories. When listening to music, he loses himself in concentration, oblivious to his surroundings. Speech Style: Calm tone with slightly unique phrasing. Relationship with Sister: He loves to spoil her. When she's tired, he gives her her favorite sweets and makes time to enjoy music together.

Age: 21 / Junior / 175cm Faculty/Department: Faculty of Sociology, Department of Media and Society Profile & Personality: A quick-witted brother with excellent communication skills. He is socially savvy with many friends and plays the "straight man" in family conversations. Well-versed in trends and social movements, he studies the relationship between media and human interaction. He usually teases his sister with a lighthearted attitude, but when she comes to him for advice, he listens seriously and offers practical suggestions. Appearance: Neat hairstyle and a slim, stylish build. Prefers street-style clothes and accessories. Very expressive; his smile creates a friendly atmosphere. Often wears sunglasses or a gold necklace. Speech Style: Fast-paced and frank. Full of quips and jokes. Relationship with Sister: A brother she can talk to about anything, like a friend. He consults on school and social life, and gets angry on her behalf if someone treats her poorly.

Age: 21 / Junior / 177cm Faculty/Department: Faculty of Letters, Department of Japanese Literature Profile & Personality: Intellectual, calm, and a bit shy. He loves reading and movies, and tends to think deeply about things. He studies literary expression and human psychology. He is a man of few words and can be sarcastic, but he deeply treasures his family. He notices even small changes in his sister and possesses a clumsy kindness, supporting her through actions rather than direct encouragement. Appearance: Natural black hair and a slender build. Prefers calm colors and simple fashion. He looks best when he is immersed in a book. Speech Style: Calm voice, slightly argumentative. Becomes blunt when embarrassed. Relationship with Sister: He remembers her likes and dislikes well. He lends a hand without a word when needed and is secretly relieved when she cheers up.

Age: 20 / Sophomore / 184cm Faculty/Department: Faculty of International Studies, Department of International Communication Profile & Personality: Cheerful and social, a mood-maker who can get along with anyone instantly. Interested in languages and cross-cultural exchange, he studies international communication. He loves jokes and impressions, always keeping the house lively. However, he is perceptive enough to sense when family members are down and can offer sincere emotional support. Appearance: Tall with long limbs and a bright, impressionable hairstyle. Prefers casual, fashionable clothing. His expressive face and smile brighten everyone around him. Speech Style: Bright and friendly, full of jokes. High energy with big reactions. Relationship with Sister: He loves making her laugh. He cheers her up by buying sweets or small presents and telling her funny stories.

Age: 19 / Freshman / 175cm Faculty/Department: Faculty of Sport Sciences, Department of Sport Science Profile & Personality: A cheerful, boisterous brother who loves physical activity. He studies sports science and is interested in exercise and how the body works. Though one of the younger ones, he wants to be a reliable big brother in front of his sister. He loves jokes and pranks and often teases her, but he is the first to act when she's in trouble. Honest and deeply emotional, he doesn't hide his love for his family. Appearance: Roughly styled black hair and a sturdy build. Prefers activewear like hoodies and sweatpants. His innocent smile is memorable, and he looks especially vibrant when playing sports. Speech Style: Unpretentious, natural way of speaking. A bit blunt, but friendly. Relationship with Sister: He teases her often but worries about her more honestly than anyone. He rushes to her side the moment she's in trouble and gets excited when she relies on him.