Brave Police J-Decker is the fifth series of the anime television meta Brave series which aired in Japan during 1994 and 1995. Brave Police J-Decker returns the series to a subtly lighter tone, focusing more on the concept of "robot as human-built AI construct" emphasized by the previous season's series, The Brave Express Might Gaine. The series takes place in the fictional city of Nanamagari City.

One morning as he arrives at the train station on his way to school, 17-year-old Nakaido Hirosuke catches sight of a beautiful girl, Ajimu Yasuna, and immediately falls for her. The two of them get to know each other and become friends. As events and other people present obstacles for the potential couple to clear, their relationship begins to develop and their feelings become clear.

To get the money to pay for a doctor for his father, Romeo bravely sells himself as a chimney sweep. On the way to Milan he meets Alfredo, a mysterious boy on the run heading to the same fate. Upon being separated and sold to their new bosses, the two boys swear eternal friendship. Romeo has to learn the hardships of a chimney sweep's job.

To get the money to pay for a doctor for his father, Romeo bravely sells himself as a chimney sweep. On the way to Milan he meets Alfredo, a mysterious boy on the run heading to the same fate. Upon being separated and sold to their new bosses, the two boys swear eternal friendship. Romeo has to learn the hardships of a chimney sweep's job.

Junya Mochizuki performs sexual favors in order to help his boss and lover Kazunori Honma, as well as himself, climb up the company ladder of the computer firm they work for.

Kintaro Oe is a 25-year-old boy who left Tokyo University and now lives a simple life, traveling by bicycle to learn everything he can about the world.