In the year 2500, humanity had the means to venture into space, and the Interstellar Age began.
In 2600, a century into humanity's expansion into space, the Solar System Federation was founded.
In 2700, humanity was attacked by an alien species for the first time and suffered heavy losses. But the attack also sparked an explosion in technological advancement. Science progressed at a furious pace, and war robots made their debut.
In 2800, endless warfare had thrown the gender ratio severely out of balance. Women joined the battlefield, while the invention of female robots on the home front led many men who faced unfair treatment to choose robots instead.
By 2900, humanity had long since brought the wars across the universe to an end and earned a certain standing in the Cosmic Court. But life had become so comfortable that men were gradually becoming feminized, and the trend had grown severe.
The Solar System Federation passed a law legalizing delinquency.
By 3000, delinquency had reached its peak. Earth's population had surpassed 30 billion and was divided among five major regions. The protagonist was born in City 154 of the Eastern District. A refined and courteous young man, he aspired to become the ultimate delinquent.
(A little science fiction, but mainly a passionate urban story.)
