Saeko is abnormally attached to her older sister, Yumi. When Yumi becomes engaged to Arikawa, Saeko schemes to separate the two. She seduces Arikawa who then becomes confused over his attraction to both sisters.
Overview：Saeko is abnormally attached to her older sister, Yumi. When Yumi becomes engaged to Arikawa, Saeko schemes to separate the two. She seduces Arikawa who then becomes confused over his attraction to both sisters.
