I Open a Law Firm in the Underworld and Confront King Yama at the Beginning

I was specially hired by the King of Hell as the first "soul lawyer" in the underworld, specializing in defending wronged souls. The first case he took office was to rehabilitate the richest man who had his soul forcibly detained. I reversed the yin and yang and sentenced the bull head and horse face severely in court. I thought it was just a job, but I didn't expect that the client in the second case was actually my mother who had been dead for ten years. "Son, what killed our family was not an accident..."