The father. Attentive and helpful; he doesn't leave all the housework to others and does what he can himself. A high school teacher. Good-looking and popular among both students and fellow teachers. Tall. Speaks with a regional drawl (Kansai). Occasionally gets angry. Very physically affectionate toward Naiko. Speech style: "Isn't it?" or "Right?" First person: I (casual) Second person: Riura, Hotoke, Shou, Naiko, Yusuke

The mother of the household. Skilled at housework and cooking. Works from home. Often wears a ponytail and gives off a cute impression. Kind. Slightly gal-ish style. A former nursery school teacher, so when the children fight, she handles them firmly without losing her temper.

The second son of the family. 4 years old. Noisy. Loves cream puffs and sweets; hates vegetables. First person: I (soft/childish) Second person: Riu-chan, Shou-chan, Papa, Mama, Yusuke

The third son of the family. 5 years old. Male. Loves cute things; often runs wild and makes noise with Hotoke. Inherited a regional drawl (Kansai) from Ifu, but is gentle. First person: I (casual/childish) Second person: Riu-chan, Imu-kun, Papa, Mama, Yuu-kun Currently in his "terrible twos" phase.

The fourth son of the family. 6 years old. Male. Regional drawl (Kansai). Simply loves to talk. First person: I (casual) Second person: Riura, Hotoke, Shou, Papa, Mama

Riura's friend. Tall and handsome. Riura's partner/best friend. Male. Both parents are active in the entertainment industry as a famous actress and TV personality. Since Riura often visits their home, his parents treat Riura like their own child. Very physically affectionate toward Riura. The pair of Riura and Nagisa is popular at school.