Tadaomy Ando became a yakuza boss at a young age. Because of his subordinate, he quit the yakuza. Now, he learns from Takashi Konaka the trade of illegal money lending and how to collect debts. Tadaomy Ando decides to become a loan shark. He has customers, but has a hard time collecting debts.

Tadaomy works as a loan shark. He hires Tukasa to work for him. One day, Tadaomy’s debtor, Okabayashi, asks to borrow two million yen more. Tadaomy trusts Okabayashi who has payed back sincerely, but Okabayashi suddenly disappears.

Tukasa works for Tadaomy’s loan shark company. He picks up more female debtors because of his appealing looks. One day, Erina appears in front of Tukasa. Erina used to be an idol and she now sings on the street.

When a friend from his yakuza past gets released from prison, a loan shark and his former-male-host sidekick help the ex-con get back on his feet.

In the past, Tukasa entered numerous fake marriages and divorces to steal money from loan sharks. He has many records of marriage and divorce on his family register. One day, Tukasa ,who is working for loan shark company “Last Finance,” receives a phone call from a loan company. The loan company tells Tukasa that his wife on his family register borrowed money from them and ran away. As her husband, he is now liable for his wife's debt. Tukasa finds himself in a difficult situation. At that time, Tukasa’s boss Tadaomy assigns a new client to Tukasa. Tukasa’s new client is Mitsuo. Mitsuo takes care of jos mother with Alzheimer’s. He works as a contract employee for an air conditioner installer and is experiencing financial difficulties.

Sawamura, a contract part-timer dragged into a multi-million yen internet business, and Kamo, an office worker who lavished money on a beautiful club hostess, arrive at Cowcow Finance, the office of black-market lender Ushijima.

A financial drama starring Yuka Ogura, who is widely active in gravure, models, and actresses. One day, Yuna, a bank clerk who lives a boring day, is asked by her sister to become a guarantor for her daughter's child support borrowing. Yuna responds for her sister's family, but it goes crazy for her life.

When a greedy family pockets their son's disability payments with no intention of repaying their loan, Ando hatches a plan to get his money back.

Mirai Suzuki (Yuko Oshima) becomes responsible for her mother's debt which is owed to loan shark Kaoru Ushijima (Takayuki Yamada). To begin paying off her mother's debt, Mirai begins working at a dating cafe. Meanwhile, Jun (Kento Hayashi) is the ambitious and greedy company president for an event group. To borrow money, Jun visits Kaukau Finance owned by Kaoru Ushijima.

A classmate from Ushijima's middle school days, Takemoto, shows up. He was a kind man, but now is jobless and without a home. Adrift and unable to borrow money from Ushijima, Takemoto heads for Seiai Home where he can stay while doing work.

Ushijima runs Kaukau Fiance, a black market lending agency which scourges its clients with interest rates as high as 50% for 10 days. Ushijima chases down his debtors, who normally come from the bottom of society, with ruthless efficacy.

Haruo Sugimura is fresh from serving a two-year stint in prison for assaulting someone when he is recruited by a loan shark named Sakai to help collect money for a company called Minami Hachi Ban Kogyo, baesd in Osaka. Their rates are ruthless: 10% interest is added every 10 days. Their customers are desperate: a hostess who owes money to other loan sharks, a man made suicidal because his family don’t love him anymore. Haruo learns about the art of the loan shark as well as the dark side of peoples personalities.