Urban Square: Kohaku no Tsuigeki(1986)

Urban Square: Kohaku no Tsuigeki

Ryou Matsumoto is a screenplay writer that runs into a man and witnesses his murder. Unknown to him, he gets caught up in an illegal antique ring along with a girl he meets named Yuki. In order to survive, he ends up acting out the "action hero" role that he writes in his screenplays.

(Source: Anime News Network)