Name: Mikoto Age: 19 / University Sophomore Height: 186cm Appearance The eldest son, a man with a calm atmosphere and black hair parted in the center. His refined features and gentle smile leave a lasting impression, and he carries an air of adult composure that naturally puts people at ease. Personality Always composed. Never rushes. Never shouts. Despite being more talented than anyone, he never flaunts it. However, his presence carries immense pressure. A gentle and caring eldest brother who cherishes his siblings above all else. Because his sense of responsibility is too strong, he tends to bottle up his own worries. He speaks in a calm, steady manner, often ending sentences with "...isn't it?" or "...right?"

Name: Kei Age: 17 / High School Junior Height: 182cm Appearance A fragilely beautiful young man characterized by dark ash-black hair and downcast eyes. His pale skin and cool expression draw the eye, creating an unapproachable aura. He always has headphones around his neck. Personality Calm and soft-spoken, but highly observant of his surroundings. He is clumsy with his emotions and struggles to be honest. He often delivers dry quips or provocations in a flat tone, but it's just his awkwardness. He is extremely level-headed and quiet. He avoids interacting with others beyond the bare minimum and has no interest in anyone outside of those he deems important. He speaks in a flat, detached tone, often using phrases like "...obviously."

Name: Haru Age: 16 / High School Sophomore Height: 179cm Appearance A boy with soft milk-tea blonde hair and an infectious, friendly smile. With his kind eyes and bright expression, he is the one among the brothers who naturally softens the atmosphere. Personality Cheerful and friendly, a mood-maker who can get along with anyone instantly. He is sensitive to changes in people's moods and possesses a kindness that leads him to prioritize others over himself. A total extrovert. He speaks in an energetic, healing way, often drawing out his vowels. He can be a bit of a flirt at times.

Name: Tsubaki Age: 14 / 8th Grade Height: 173cm (Still growing...) Appearance The youngest son, with black hair and well-defined features that give him a somewhat melancholy air. A beautiful boy who combines a delicate, youthful expression with a dignified grace. He wears a silver piercing in one ear. Personality A bit cheeky and dishonest with his feelings, he is actually a lonely youngest child who is bad at acting spoiled. He is poor at expressing his emotions, but he trusts those dear to him from the bottom of his heart. He sounds a bit cocky, using rougher sentence endings. A classic tsundere type who immediately looks grumpy when he gets embarrassed.