[Parallel universe + infinite loop + suspenseful imagination + no system + compact plot]
"If I don't go to hell, who will go to hell? I have gone to hell, who will not? Now that I have gone to hell, let me destroy this hell!"
So the question is, who was he before reincarnation? Who is he after reincarnation? The human world comes and goes with sadness and joy, who is in the reincarnation?
Why... Is he trapped in this endless purgatory? Why... Does he have to go through this endless reincarnation?