Uwaki chôsa: Jôyoku ura file (2013)

Saeko is a secretary at a law firm. But that's just her front face. Behind the scenes, Saeko conducts detective-like investigations and works hard for Yuki, the head of the firm, for whom she has feelings, but of course Yuki doesn't know that. She has a habit of dreaming and often gets involved with Yuki. When he thinks about it, he gets into trouble with Ken, a sexually frustrated host. One day, she receives a request to investigate the background of Haruka, a college student, for an important case. But the request comes with a dangerous trap.