From Endless Journey:
Hakata, a town rumored to count 3% of the population as killers. Fukuoka: a tourist city that, at first glance, looks peaceful. But underneath this facade, the streets are rampant with crime and it has become a battleground for professional killers. A first-year member of society on an edge, a hitman employed by the mayor, a private detective that loves Hakata, a genius hacker's information business, a too-beautiful avenger, and a hitman taken in by a sinister organization. Those who are good at being evil will force Hakata out onto the stage.