Binbō Shimai Monogatari (貧乏姉妹物語, lit. Poor Sisters Story), also known as Flat Broke Sisters, is a Japanese manga series written and illustrated by Izumi Kazuto. It was serialized in Shogakukan's seinen manga magazine Monthly Sunday Gene-X from April 2004 to October 2006, with its chapters collected in four tankōbon volumes. A ten-episode anime television series adaptation by Toei Animation was broadcast from June to September 2006.