Quick Transmigration: The Little Fox Goes to Save the Villain Again

[Scheming, unhinged Demon Venerable × innocent, beautiful little fox] [Two male leads + quick transmigration + both devoted to one another + villain + obsession + redemption] The innocent little fox Bai Weixi was tricked by a shady System into entering three thousand worlds to save villains. His mission was to bring warmth to the villains, lower their corruption levels, and then leave once the job was done. But in every world, he worked diligently to complete his mission, yet still couldn't escape a fatal ending. Then he discovered that it had all been punishment from the Heavenly Dao.