I have mixed feelings about Death Parade having a second season, some people argue that the series would be screwed if it did have a second season. There were things that weren't further explained in the anime, like how the arbitors were humans that were sent to the void, or Decim having human feelings. If the anime did get a second season it would feel a little boring without Chiyuki though, where would the second season even start anyway? I heard the anime was a failure in Japan though, so I doubt a second season would be in the making.