Oai Finance, operating in the suburbs of Tokyo, is infamous as a high-interest loan shark. They anticipate that borrowers may become unable to repay their debts due to some circumstances and thus require female relatives or close family members to act as guarantors when lending money. If the borrower defaults, they allegedly forcibly abduct these women and sell them off to recover the debt. Such rumors about this notorious financial company are rife. The daughter of a gambling-addicted father who borrowed from this infamous lender, Rei, is forced to take on her father's debt while he is hospitalized. She falls into a fate of being subjected to forced labor to repay the debt…
