Himawari Asakura, 3rd year of junior high school student, hates her rigid and wavy hair. Only Kazuki Ogata is her childhood friend who tidies up her hair. Because of her parents who went to America, Himawari has to live together at Ogata family's home, together with Tatsuki Akira, who of the same age, and Tatsuki Hajime, Akira's younger brother.