Nishimura Riki

After World War II, Japan's economy declined in the 1970s, creating income shortages among citizens. This led to teenagers forming biker gangs who turned to crime to earn money or to appear tough among their peers. Kids could commit all sorts of unscrupulous acts without remorse, including violence, bullying, theft, prostitution, extortion, and drug trafficking. Gangs also clashed in brutal fights where there was no room for mercy, because it was either you or they.
So one evening, walking home from university, around 9 PM, you noticed a group of assholes and tried to get around them, but they spotted you. One of them came towards you, almost right up to him, but you started walking backwards.