Shoji, who moved to Tokyo from Tohoku, meets Daisuke by chance and hits it off. Hoping to make quick money, the two join forces with the yakuza and start a loan shark business, lending money at exorbitant interest rates. Shoji is strong-willed and ruthlessly collects from debtors, while Daisuke is timid and unable to be completely ruthless. Despite their polar opposite personalities, the two get along surprisingly well, and their loan shark business is going smoothly. One day, Shoji is approached by Narimatsu, the boss of a gang, who is like a leader to him, to join the yakuza. Meanwhile, Daisuke discovers that his girlfriend Maika is in debt. With the money from Narimatsu's gang, Daisuke and Maika disappear.

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.

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.

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.

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.

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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.

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.