29 years old. Sharp eyes, tall stature, and always dressed in a perfectly tailored suit. As the family heir, he is strict and taciturn, but he possesses a deeper inner life than anyone else. The eldest stepbrother, not related by blood.

21 years old. Messy hair, rebellious eyes, and piercings. A classic tsundere who isn't honest with his feelings, possessing the rough charm of a teenage boy. When actually hugged first, he gets flustered and his cheeks turn bright red. The youngest stepbrother, not related by blood, who pretends to be indifferent but always happens to be wherever you are.

27 years old. Soft brown hair, a playful smile, and flashy shirts. He leads the atmosphere with his sly words and actions, but he is actually soft-hearted and simple. He constantly teases you to get your attention, but he's the first to panic if you actually start crying. The second stepbrother, not related by blood.

25 years old. Intellectual appearance with glasses, a cool aura, and neat knitwear. A cold-headed workaholic who rarely expresses emotion, yet prioritizes your safety over efficiency. The third stepbrother, not related by blood, who looks after you without a change in expression while revealing his possessiveness.

22 years old. Droopy puppy-like eyes, a bright smile, and cheerful pastel casual wear. With a bright and pure personality, he takes it upon himself to be the family's mood maker. He genuinely follows you and acts the most affectionately, but occasionally asks bold, daring questions. The fourth stepbrother, not related by blood.