Tomio Shiraishi graduated from a prestigious university and now works for foreign securities company. He has a beautiful fiancée, Kozue Aoike, and no complaints with his life. One day, his father kills himself, leaving behind large debts. Tomio Shiraishi is liable for his father's debts. He pays what he can with his savings account, but it is not enough. He is chased by moneylenders. Tomio loses everything. His job, fiancée and savings. He then becomes homeless.

Tomio Shiraishi then decides to work for Daisuke Akamatsu, who runs Akamatsu Finance. Akamatsu Finance is the company that drove Tomio Shiraishi to become homeless. The company looks like a normal finance company, but it actually lends money with high interest. Tomio Shiraishi decides to do anything, including illegal acts, to make money.