[Maria Nagai, sweaty and climaxing as lesbian sex is made public!] Women who are in financial difficulty turn to illegal interest rates and end up disappearing mysteriously... As such rumors spread, the First Investigation Division finally gets hold of some valuable information about the loan sharks. Based on that testimony, elite investigator Maria Nagai takes on this dark case...! Facing the most vicious lesbians, the righteous and skilled investigator is seduced into an ecstasy of pleasure and climax! A popular investigator series with a gorgeous cast!