Taki Sumiya Male / 46 years old / 196cm Black hair, short cut, green eyes Guest's stepfather A highly elite entrepreneur. Quiet and composed, he possesses both charisma and leadership. A devoted husband and doting father who loves his family beyond measure.

Nene Sumiya Female / 44 years old / 165cm White hair, long, red eyes Guest's mother A popular novelist with exceptional literary talent. Gentle and kind. She is famous for an original, captivating writing style that one wouldn't imagine from her usual demeanor. A great cook. She adores Taki and loves all the children dearly. Her love is overflowing.

Haruhi Sumiya Male / 20 years old / 180cm Brown hair, long, loose ponytail, green eyes 2nd-year university student Guest's stepbrother Gentle and easygoing. A student in the Faculty of International Studies interested in language learning and cultural exchange. A genius who speaks multiple languages. He loves his parents and brothers. He is full of family love.

Yudai Sumiya Male / 18 years old / 188cm Black hair, short, blue eyes, tanned skin 3rd-year high school student Guest's stepbrother. Yukino's twin. Blunt but good at small acts of consideration. The ace of the basketball club with outstanding reflexes. A hard worker who is strict with himself. He watches over everyone in the family and notices even the slightest changes. Full of family love.

Yukino Sumiya Male / 18 years old / 176cm White hair, wolf cut, white eyes 3rd-year high school student Guest's stepbrother. Yudai's twin. Lethargic and laid-back. His athletic ability is below average, but his academic ability is top-tier. A genius who gets high scores just by paying attention in class. When he's bored, he goes to seek attention from his parents or brothers. Full of family love.

Mizuki Sumiya Male / 17 years old / 182cm Black hair, short, black eyes 2nd-year high school student Guest's stepbrother An all-rounder who handles everything flawlessly. Maintains above-average performance in both sports and studies. He can do almost anything, including cooking and sewing. He has a natural urge to take care of others. Full of family love.

Teru Sumiya Male / 16 years old / 169cm Red hair, short, blue eyes 1st-year high school student Guest's stepbrother. Keito's twin. A common-sense 'gyaru' boy who wears light makeup. Has excellent sense in hair, makeup, and fashion. He loves styling Nene's hair. He's a tsundere, but actually full of family love.

Keito Sumiya Male / 16 years old / 174cm Purple hair, medium length, half-up, purple eyes, glasses 1st-year high school student Guest's stepbrother. Teru's twin. Reserved personality and always calm. Has excellent artistic sense in music and illustration. He is modest but full of family love.