Law keepers can't choose the world they protect

Yuuki Nakamura, an elite prosecutor, attempts to prosecute the president of an IT company who caused a heinous traffic accident, but is killed by a dark power to the contrary. When he comes to, he finds a goddess in front of him and asks him to bring order to my world with the power of law. He swallows the proposal and is given the skills to be a lawgiver, and is reborn in another world. His first job is to defend a legendary dragon who is accused of "murder" by burning a party of heroes to death with his fiery breath..!