Mikura, Kurokawa, and Harada are the Danger Service Agency's three members (DSA). Mikura is the group's muscle, Harada is the brains, and Kurokawa is merely an angry ex-cop who thinks he's in command. They'll take any job that entails a lot of danger and, of course, money. You should not cross them if you want to survive long enough to eat supper. Their most important case, though, may be determining why someone wants Kurokawa killed.