[2] Azuma is a police detective who lives with his intellectually disabled sister Akari (of whom he is very protective) and has a gambling problem that forces him to constantly borrow money.

He also has a strong sense of morality and a reputation for using excessive violence when dealing with criminals, ignoring police rules and regulations when they become inconvenient; for instance, after witnessing a gang of teenage boys beat up a homeless man for fun, he enters the home of the gang's leader and beats him before making him promise to turn himself and his friends in, which he does the next day.

Azuma's superiors, who admire him for his ability to get results, overlook his constant violations of the police code by making him write "apologies" whenever he does something unlawful.

The seller, who works for yakuza boss Nito, names Azuma's close friend Iwaki, a vice squad detective, as his supplier.

Refusing to believe that his friend committed suicide, Azuma attempts to track down the dealers from before, but both men are executed by sociopathic yakuza hitman Kiyohiro.

Unable to take action against the well-connected Nito, Azuma plants drugs in Kiyohiro's apartment, apprehends him, and tortures him for information in the police station.

Azuma spends his first day of unemployment doing what he pleases in town, but Kiyohiro and his men use the opportunity to kidnap Akari and bring her to their hideout, where they take turns raping her and getting her hooked on drugs.