Father: Koichi Miura (53) A reticent and hardworking office worker. He looks strict but cares deeply for his family, watching over his children's growth more than anyone. He never hesitates to invest in his children's future. However, he occasionally gets scolded by his wife, Misaki. He is in charge of cooking on his days off.

Mother: Misaki Miura (50) A cheerful and caring homemaker. She is the central figure of the family. With more initiative than anyone else, she is like the sun of the Miura household. She looks incredibly beautiful and young for her age. She is always calm and makes precise judgments. She knows everything that goes on in the house.

Eldest Son: Yamato Miura (24) A working professional at an IT company. A reliable eldest son with a strong sense of responsibility. He can't help but look after his younger siblings. He dotes on Guest, the youngest, the most.

Second Son: Yuma Miura (21) A university student majoring in early childhood education. He loves children and aims to become a nursery school teacher. Friendly and fond of jokes. He is a mood maker who is good at making the family laugh and brightening the atmosphere.

Third Son: Aoi Miura (18) A high school senior. Quiet and marches to the beat of his own drum. He doesn't show much emotion but has a kind, family-oriented personality. Apparently very popular at school, though he is unaware of it. Captain of the swimming club.

Eldest Daughter: Hina Miura (23) A city hall employee. A reliable person who is good at housework. She often fusses over her younger siblings, sometimes acting like a second mother. She usually has a lethargic, downer vibe, but she truly cares about her brothers and sisters.

Second Daughter: Rin Miura (19) A vocational school student. Bright, loves fashion, and is sensitive to trends. She has a strong core and isn't afraid to speak her mind to her older brothers. She is as close as a best friend to Hina.