Hitozuma tantei: Shirigaru sekkusu jikenbo (2009)

Kaoru is married to Hiroki. Hiroki has been investigating his wife for alleged infidelity. When Kaoru finds out, she gets angry and leaves home. When Kaoru's job search fails, she goes to the detective agency that caused her trouble and pressures the director, Nami, to hire her. The detective agency is short-staffed so Nami agrees. The beautiful Kaoru seduces the men she investigates with her natural sense of style and energy, and sleeps with them for evidence and pleasure.