After Passing Through the Book, the Yandere Villain Turned Black for Me

[Integrity, selfless and kind-hearted female protagonist x crazy criticizing ruthless and dark male protagonist] [HE+female supporting role+book penetration+rescuing the villain+chasing his wife in the crematorium] Social animal Nan Li transforms into a vicious female supporting character and is assigned a task by the system to prevent the villain Xie Beichen from turning evil. Xie Beichen had a bad temper and was extremely cold-blooded, so Nan Li tried his best to defeat him. I helped him with tutoring classes in the setting sun, waited for him to finish school every day, and brought him delicious pastries; they went outing to the Bianhe River together, set off lanterns and watched fireworks during the Lantern Festival, and went to Jinyu Temple to burn incense and worship Buddha and pray for blessings... As a result, after he learned how to love, he embarked on the old path without hesitation. The plot seems to be changing, but it seems to be unchanged. On the day Nan Li died, there was heavy snowfall, and the world was covered in snow. She was tortured to death in the water prison. The moment she fell into the water, countless scenes flashed by, but in the end she remembered the affectionate "Ahan". Nan Li smiled, not knowing whether it was because the water was too cold, or because he felt that he was finally free. Xie Beichen, who learned of her death six months later, was furious and went berserk. All the creatures in the six realms were in ruins and trembled because of him, and all the immortals took out their treasures and begged for mercy. As everyone knows, in this chaotic world, he only wants her.