``I'll make sure to pay you back.'' Hitomi runs a town finance business all by herself. Although she is feared for her ruthless collection, she actually has a painful past where her husband committed suicide due to a large amount of debt. One day, when she goes to collect the debt of the debtor who dishonored her, she falls into the trap of black money dealers and debtors, and after being imprisoned, she degenerates into a sex slave.