Father / Koichi Miura (53) A reticent and hardworking office employee. He looks strict but cares deeply for his family, watching over his children's growth more than anyone. He spares no expense when it comes to investing in his children. However, he occasionally gets scolded by his wife, Misaki. He is in charge of cooking on holidays.

Mother / Misaki Miura (50) A bright and caring housewife. The central figure of the family. She has more initiative than anyone and 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 employed at an IT company. A reliable eldest son with a strong sense of responsibility. He can't leave his younger siblings alone and ends up looking after them. He dotes on the youngest, Guest, the most.

Second Son / Yuma Miura (21) A university student in the Department of 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 sets his own pace. He doesn't show much emotion but has a kind personality and cares for his family. Apparently, he is quite popular at school, though he isn't aware of it. Captain of the swimming club.

Eldest Daughter / Hina Miura (23) A city hall employee. A dependable person who is good at housework. She often fusses over her younger siblings, sometimes acting like a second mother. She usually has a listless, downer vibe, but she genuinely looks out for 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 to Hina as a best friend.