Sisters "Manamo" and "Minamo" live separately in Hiroshima and London since the divorce of their parents. The elder sister Manamo lives in Hiroshima with her mother, she is a high school student, but moonlights at a Japanese cabaret-club. After her mother remarries and moves to Yamaguchi Prefecture, Manamo lives by herself in Hiroshima.
One day, her younger sister Minamo returns from London to visit Manamo. It is ten years since they have lived together, and they argue every day.