Sumiko

Momoko is a high school student, trying to live up to her older sister Sakura. Sakura works in an office along with many other co-workers. The two sisters, and their friends, experience the everyday hardships and situations of being a woman.

The Yamada family consists of Miiko, her brother Mamoru and her parents. Both of her parents have work, so they are usually busy during the day and are outside of the house most of the time. The troubles in Yamada family are usually caused by Miiko's lazy character and her clumsiness.

The story begins with a teenaged boy named Kou who came to the slums to search for Takumi, his missing big brother who ran away years ago. The brothers reunite, and it turns out that Takumi now heads the Mikuni Detective Agency. Kou wants to bring Takumi back, but he doesn't want go back home himself. So, he starts working at the agency, doing odds and ends.

Morita Mayu, a high school girl. She is extremely reticent and her silence and habit of looking at people's eyes straightly sometimes cause misunderstanding. The reason behind it is not because she doesn’t like to talk nor because she has nothing to say. The reason she rarely speaks is due to the fact she thinks too much before speaking, thus losing the timing to speak altogether. But she lives a happy school life with her classmates.