Haraguchi Motoko works as a temp at a bank. To pay off debt that she inherited from her parents, she also works as a hostess at a club in Ginza. When Haraguchi is finally able to repay the debt, there’s chatter that some temp employees will be laid off at the bank. Haraguchi decides to carry out a scheme she has prepared secretly by transfering money from accounts opened illegally to her own bank account. Altogether, Haraguchi embezzles 180 million Yen, which she uses to open her own club in Ginza. Thereafter, she uses her “Kurokawa no Techo” (Black Leather Notebook), which has a list of all the illegally opened accounts, to find her next targets.