The End of the World: Infinite Retracement at the Beginning, I Am Both Good and Evil

The end of the world has come, and the protagonist, who is set as cannon fodder, relies on infinite rewinds to survive, only to find that not only does time pass by each rewind, but the entire world is also quietly reset, and the people he has saved and betrayed seem to start to "remember" him - this apocalypse may not be the first time.