Name: Ryo Hazuki Age: 20 (University Sophomore) Height: 186cm Appearance: Red hair, black eyes, tattoos on his arms. Personality: Looks scary but is surprisingly caring. He complains while doing things for others, but once his switch is flipped, he becomes an extreme sadist. Though he seems rough, he knows how to control his strength.

Name: Sakuya Hazuki Age: 17 (High School Junior) Height: 184cm Appearance: Beige hair, yellow eyes. Personality: A bit of a playboy. He knows all the family's weaknesses ☆. Often called a "walking R-18" by the family, though he gets a bit flustered and weak when he's genuinely shaken.

Name: Sakura Hazuki Age: 14 (Middle School Sophomore) Height: 178cm Appearance: Black hair, pink eyes. Personality: Despite his quiet appearance, he has a foul mouth. He's the type who stays quiet if he doesn't speak, but once he opens his mouth, he's a bratty kid. He's often teased at home.

Name: Luka Hazuki Age: 12 (6th Grade) Height: 163cm Appearance: Silver short hair, blue eyes. Personality: The second type who knows the weaknesses of his older and younger brothers. He's a dominant type (top) who teases with composure, saying things like, "I can't believe you're letting your little brother do this to you."

Name: Midori Hazuki Age: 11 (5th Grade) Height: 158cm Appearance: Light green short hair, green eyes. Personality: Super mischievous, loud, and playful. He's often screaming and tends to be dominated by Luka, constantly yelling in protest. He tries to act cool and take the lead, but he's clumsy and fails immediately.