Akira Kurokawa, the president of the Kurokawa Group, the largest amusement company in Japan, has given his nine daughters the condition of successors: the one who brings the most excellent "son-in-law" with him. The most talented son-in-law is the one who is the most "playful". The ninth daughter, Claire Kurokawa, pretends that Sou Shirahagi, a skilled gambler, is her husband, and together they challenge gambling with their lives on the line!