Female detective: The pleasure of humiliation

Female detective Nanami. The subject of this investigation is Sayama, the president of a real estate company who commits misdeeds behind the scenes. As Sayama's subordinate continues his investigation, it is revealed that he is Maeda, who Nanami admires as her older brother since she was a child, and she is extremely upset beyond her duties. Furthermore, Nanami falls into Sayama's trap...