Los hijos de la familia Shiunji, 3

Marrying your little brother... Is it really possible? The seven siblings of the Shiunji family already know there are no blood ties between them. The youngest sister, Kotono, sees her sisters as rivals, and this causes them to start seeing each other not as family, but as men and women. Meanwhile, the fourth sister, Minami, is about to participate in the highly anticipated inter-high school tennis championship....