だまし屋本舗・蛍 ～10億ゲットする方法～

Last time Hotaru, the brilliant detective, brought a marriage fraud ring to ruin. Now she faces another formidable foe! This time, it's a man named Umeki, who leads a scam and commits all sorts of evil deeds. He's also the man who once deceived Hotaru, leading her to become a detective.