Sukoyaka Naru Toki mo Kakeru Toki mo

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)