After the Protagonist Turns Dark

My name is Wan Tejia. I just transmigrated into the xianxia novel I finished reading yesterday. Luckily, it's a traditional cultivation novel: a poor nobody works hard, levels up to become an immortal, and marries five wives.

To be safe, I decided to become the protagonist's sidekick and live under his protection.

The strange thing is, I got bound to a Whitewashing System. What's going on? Do I have to redeem the stupid, vicious villain?

First I ran into the protagonist's first wife: [Ding! Corruption value: 30]

Then I ran into the protagonist's first underling: [Ding! Corruption value: 70]

Finally, I ran into the gloomy protagonist, who was strange in every way: [Ding! Corruption value: 100]

Oh crap, the novel I transmigrated into is the dark version!

Theme: Redeeming the corrupted protagonist