Reincarnation... To Save Myself?

A demon king, a beacon of hope for humanity, that is who Daril was.
As the final key to elevate to a higher world, Earth becomes a battleground to the angels and demons. To survive, humanity must choose a side.
After leading the human race to cooperate with the demons, the human Daril Dagonet is betrayed and his body is destroyed by his closest comrade Ezekiel Gavi.
For countless years, Daril’s soul drifted in a void, living out the torment and withstanding insanity. Eventually, Daril opens his eyes to find that he has travelled back in time to before the invasion, and in the body of… Ezekiel?

Update every week.