Give the King of Curses a Taste of Undying Shock

As Ryomen Sukuna sat lost in thought, he suddenly remembered a story Xing Luyi had once told him:

Once upon a time, there was an immortal. She neither aged nor died, and no matter how the centuries turned, she remained in the world.

She had a human friend.

To help the immortal accept that one day she would die, the friend tried every day to prepare her for it, hoping the immortal would not be too sad after she was gone.

Xing Luyi smiled and said, "Ryomen Sukuna, you need to prepare me for it, too. My technique makes me ageless and immortal, while you're only human."

Ryomen Sukuna asked, "And then?"

Xing Luyi said, "It's a secret. If you marry me, I'll tell you."

Only later did Ryomen Sukuna learn how the story ended: the immortal died before an ordinary human, leaving her friend to endure a long life alone.

Just like that heartless woman.

Ryomen Sukuna never told Xing Luyi that he would become a curse and live for thousands of years. He was prepared to let his love remain with one person throughout his long life.

What he did not know was that the key to activating Xing Luyi's technique was accepting her proposal, and that she did not truly love him.

Thousands of years later, Ryomen Sukuna saw that woman again.

Her appearance had not changed at all. Wearing the trendiest JK uniform skirt of the day, she smiled brightly at her classmate and said, "Dating? I've never even had my first love!"

Never had your first love? That night, Ryomen Sukuna pinched her cheek and demanded, "Then who was the dog that proposed to you before?"

Xing Luyi: I'm cooked! My ex-husband just came back from the dead!

"Tell Me Again How You Chose the King of Curses Out of Ten Thousand Humans" and "So I Settled Down After Being a Player, but My Ex Has Been Alive for Thousands of Years"

*Blurb to be revised. I want to write about Sukuna when he was human, so this will probably be a very long novel. The Shibuya Incident won't be covered. Read at your own discretion.

*The female lead has lived for so long that she is very indifferent to good and evil, and may not care about them at all. Her values may be a little warped!

Theme: World peace