Akira Kurokawa, president of the Kurokawa Group, held derogatory views toward women in power, and would only consider a son to be his successor. However, all of his children were daughters. Akira decides to appoint a son-in-law succeed him, and in order to find the most talented son-in-law, he decides to hold a battle royale with his daughters and their spouses - a battle royale of gambling. Claire Kurokawa, the ninth daughter of the Kurokawa family, asks Sou Shirahagi, a gambler who is so skilled that he wins all the time at casinos, to join her in the battle for the Kurokawa Group as her partner and impromptu couple⦠Can Sou and Claire win out? (Source: Ultra Jump, translated)