C is set in a world where Japan goes through a
financial crisis that causes high rates of unemployment, crime, and suicide. The series revolves around Kimimaro Yoga, a 19-year-old man raised by his aunt after his father disappeared and his mother died. A scholarship student of economics, his only dream is to live a stable, ordinary life. One day he meets Masakaki, a mysterious man who offers him a large amount of money if he will allow his "future" to be held as collateral. When Kimimaro accepts the money, he becomes an "Entre" (short for "entrepreneur") and is drawn into the alternative reality of the Financial District, where Entres make transactions using a special currency called Midas Money. In the Financial District, each Entre is paired with a special creature who personifies their futures known as "Assets"; Kimimaro's Cousin designed and Asset called "raned", an asset that allowed for other users to make their own "sub-assets". Kimimaro is designated to be accompanied by Mashu, a horned girl who can conjure up fire-based attacks. Entres are summoned there once a week to compete against each other, betting their money in a battle known as "Deal". Entres who lose all of their money and become bankrupt are banished from the Financial District with tragic consequences to them or their loved ones in reality. Kimimaro first discovers this when he defeats one of his professors, Daisuke Ebara, who entered Deals to support his family. Daisuke's punishment for bankruptcy is the erasure of his children from history. Kimimaro discovers that bankruptcy led his father to commit suicide and he finds a reason to continue there despite his disinterest in money and his fear of hurting others. Kimimaro's attitude attracts veteran Entre Soichiro Mikuni, who wants him to join the Starling Guild, whose members' aim is to win by small margins so their victories do not greatly affect reality. Mikuni has a great influence over both the Japanese Government and the whole of Japan's finance market and aims to own Tokyo's Financial District. Born into a wealthy family, Mikuni was a rebel who wanted to be a musician; as his band broke up, Mikuni became a personal assistant to his father. When the elder Mikuni's corporation started to crumble as a result of the financial crisis, he chose to save it, denying his terminally ill daughter Takako the funds she needed to undergo a medical procedure unavailable in Japan. Swearing vengeance on his father after Takako fell into a coma, Mikuni bought out his father's company with the money he earned from his first victory in the Financial District to take away the thing his father held most dear. Because of this, Mikuni's Asset, Q, is modeled after his sister. It is later revealed the risk is not limited to the individual Entres' futures. Kimimaro starts to notice a few buildings disappearing in Tokyo. Later, the Southeast Asian Financial District goes bankrupt and starts disappearing, along with Singapore, and parts of Hong Kong and Shanghai. Mikuni uses his ability, "Darkness", to protect Japan from the effects of the district's collapse. In exchange for 20 years of Mikuni's future, Masakaki allows a large quantity of Midas Money to be printed and deposited into Mikuni's account. Mikuni and his colleagues use the Midas Money to invest in failing institutions in Japan. Artificially propping up failing banks and enterprises spares the Japanese economy but causes unintended consequences. People begin disappearing, poverty increases, birth rates decline, and morale drops as the Midas Money starts to invade the real Tokyo. To investigate the nature of Financial Districts, the
International Monetary Fund sends Jennifer Sato to become an Entre in Tokyo. Seeing the effects of Mikuni's actions, Sato and Kimimaro try to stop him from using up his remaining future to print more Midas Money. Mikuni defeats Sato after she passes her Asset, George, to Kimimaro, who confronts Mikuni when he is about to use the Midas Money press in exchange for rest of his future. With the help of Masakaki, Kimimaro realizes he is in possession of a black card, giving him the means to revert the press. A struggle for control over the press ensues, and Mikuni and Kimimaro engage in a Deal. The battle is concluded when Midas Money disappears from the world along with Mikuni's powers, allowing the crisis to pass through Japan without influence. Declared the winner, Kimimaro orders the reversing of the presses and the return of the futures to their original places. With the Assets disappearing as a result, Mashu kisses Kimimaro before she disappears. Kimimaro then returns to reality to find that US dollar has become Japan's official currency and everyone's futures have been returned to them. However, Masakaki appears before Kimimaro and explains to him that the Financial District can reappear. ==Voice cast==