[Big volume version with many pages!] When Natsuo was in elementary school, her mother and uncle died in a house fire. Natsuo's father, Daisuke, took over the Noshiro industry from his deceased uncle, and Natsuo ended up living with her father and brother at the Noshiro family, where her grandparents and uncle's family live. She is persistently harassed by her late uncle's wife, Asami, but she eventually falls in love with Asami's son, Hideaki.