The reason why Murota Yukio, the manager of a violent loan shark branch, has come to a southern island with the playful Yamakura Osamu is... He plans to divert the gang's funds and make Yamakura pay back the 20 million yen he lent him with his life. Murota is irritated that his own life is in danger if this is discovered, so Yamakura again proposes a money-making opportunity to him - commercializing "Kakka Nonnon," which turns feces into colorless, odorless ash. He is told that he can make a guaranteed profit of 10 billion yen. Murota is taking on the gamble of a lifetime, with the chance to either end up as a scumbag yakuza for the rest of his life, or grab 10 billion yen! A funny, hilarious, hard-boiled romance about two dirty men.