Sukuna's Little Sister Is Struggling to Survive Again

[Third-person narration] [Completed, waiting for bonus chapters to be updated]

You live with an ordinary family in the Heian era. Life is uneventful, but a little poor.

The only problem is that the villagers treat your family strangely. They seem wary of something and hate you, but still maintain a superficial peace.

Then one day, you happen to overhear your parents talking in private and learn that you have an older brother.

A... monster brother with four arms and two faces, said to be the child of calamity.

You gasp in horror and start checking your body regularly.

After that, you pretend nothing happened and live through a stretch of superficially peaceful days.

Until one night, you wake from your sleep and discover the village engulfed in flames, while your parents kneel before a strange man, begging for mercy.

Four arms. Two faces.

It's your monster brother!

You watch your monster brother sneer and wave his hand, cutting your parents into eight pieces. He looks up at you, then waves his hand again...

You drop to your knees with a thud (your legs just gave out, you're not a coward!) and suddenly awaken your cursed technique, successfully stopping the slash that was about to cut you into eight pieces, too.

Your monster brother raises an eyebrow and carries you off.

As he carries you through the wind, you silently shed tears and hope that one day you'll be able to avenge your parents.

You spend a long time alongside your monster brother, living a miserable life where everyone wants you dead.

At last, one day! A huge crowd joins forces to attack your monster brother. You're thrilled, and sneak among them, slacking off while secretly acting as a double agent.

Your monster brother dies. You shed a few crocodile tears, and apart from a faint feeling of loss in your heart, you're overjoyed.

You, too, are hunted down and killed in the attack.

Because they think Ryomen Sukuna is a bad person, they assume you must be bad too, since you stayed by his side!

When you open your eyes again, a thousand years have passed.

No annoying brother, and no jujutsu sorcerers around to bother you. It's the perfect retirement life!

Until, while casually passing by a cafe, you overhear a curse wearing human skin and two other curses openly discussing their grand plan to resurrect Sukuna.

???

Who? Who are they trying to resurrect?

They say love is the most twisted curse of all.

Sukuna is certain his sister has been cursing him bitterly every moment of every day for a thousand years.

So what if their bodies are gone? Their souls will surely be bound together for all eternity, cursing each other.

Tip: You can start at the end of Chapter 1 and continue with Chapter 2~

Please note:

1. This story isn't about getting along lovingly. It's about sabotaging each other, loving and hating each other.

2. It contains a lot of elements, including pseudo-incest, forced love, a little bit of selfcest (?) and nonhuman characters (so does the original version of Sukuna count as nonhuman?).

3. The heroine and Sukuna are not blood-related. Sukuna knows this from the start, but the heroine only finds out later.

4. The pairing is with Sukuna.

4. A crossover with Noragami, Demon Slayer, and Jujutsu Kaisen. Most elements are heavily altered, and many timelines differ greatly from the original works. Please forgive any out-of-character moments.

Theme: Strive! Stay positive! Keep moving forward!