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Makoto Kanakura is an earnest young man who works hard to pay back his father's debts. One day, Minami Godai, a moneylender, comes to his house to collect on his debt and introduces him to a lucrative job. Minami says, "For each time you have sex with me, I'll count it as repayment of 30,000 yen." Makoto made his mind to take the job offer to pay back his debts and is ready to let Minami getting inside him. But unexpectedly, Minami begs for him to come inside him..! What will happen to the ”love-is-money" relationship between an earnest young man and a hussy-bottom moneylender?