Undercover investigator Manami endures the pleasure...

Suicide due to debts that have skyrocketed since the beginning of this year...As he continued to make offers, he discovered the existence of a malicious underground loan called Tsujimaru Smile Loan. ...What will be the fate of Manami, a beautiful female investigator who infiltrates the den of evil disguised as a debt-strapped office lady who wants to borrow money...!