Ritsuko Kazami -- Aventure wa Gorgeous ni（アバンチュールはゴージャスに）

The above is a video put up by YouTuber atsu M which introduces a shot from the 1985 hardboiled series "Hokori no Houshuu" （誇りの報酬...The Reward of Pride） with Masatoshi Nakamura（中村雅俊） and Jinpachi Nezu（根津甚八） as two veteran detective sergeants. The music is what I assume to be the opening theme composed Yukihide Takekawa（タケカワユキヒデ） of the band Godiego（ゴダイゴ）. A song that was neither used as an opening…