Harukaze Hinata, burdened with her late father's debts, changes jobs in the financial industry... She becomes a subordinate of Toudou Ryuuhei, the darling of the financial circles with an annual salary of one billion yen, but Toudou is engaged in insider trading to make big money by seizing inside information of companies! Harukaze believes that "only inside information can make big money," and under Toudou's willingness to break the law, will Harukaze be able to save her clients from the hyenas that lurk in the market?!