As Sukuna in Invincible - Chapter 2: Integrating

Cultivating his power by slaying demons and taming countless beasts, the emperor solidified his throne as the world's ruler. But not once in his life had he expected that his disciples would use research on demonology to sap the world tree's power and push the world to destruction.Trying to fix his mistake, he opted to use all of his cultivated power to cure the world tree and block anyone from sapping its power ever again. But in exchange, he was to lose all of his power.But...the worst had happened, his wife... had betrayed him.

Jin Runcandel is the youngest son of the greatest Swordmaster. After he gets himself kicked out of their clan, he meets a tragic fate…but before he dies, a God gives him a second chance. Now he must use his new power for good.

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates

Ling Zhen transmigrated as a female cannon-fodder in a dog blood novel.

The female partner had plastic surgery done for the novel’s male lead, and then divorced her husband. The ex-husband blackened in the later stages of her life, becoming a big villain in the novel.

And she, for betraying her husband, and angering the only relative he had, was finally retaliated by the blacked-out boss, and is killed in a mental hospital. Orz

Fortunately! She transmigrated just in time and the big guy hasn’t turned black yet.

So Ling Zhen turned into a healing little fairy, sang sweet songs and danced fairy dances, touched her head and cooked lovingly.

Appease his violent mood, change his paranoid thoughts, reform his antisocial behavior – at last! Transformed a black bomb into a good young man with a docile temperament and a positive attitude!

The potential safety hazard was completely eliminated, and Ling Zhen finally dared to leave with confidence, so she took out the divorce letter that year.

The next second, heaven and earth changed color, and the superficially good villain will be suddenly! instantly! blackened!

Ling Zhen was so frightened that she cried, “A-Anything else? QAQ”

Wei Xi suppressed his emotions disguising them with a smile, while the underneath of his eyes filled with real madness: “Yes, there is.”

Stay with me forever and don’t run away.

—————

Wei Xi is sick. He has always known of the misery, paranoia, and possessiveness in his bones.

His little fairy thought she had cured him.

Actually…not really.

After possessing her, his sickness, worsened.