I Keep Rewinding After Dying in the Jujutsu World, but I'm Just an Ordinary Person

"My older brother was like a hero. That's what I thought of him until that day."

*

When Tsubaki Yui was five, a house collapse took both her parents.

Everyone thought she had simply survived by chance. Only Tsubaki Yui knew that she had already died once, and was alive only thanks to the ability [Death Rewind] she gained after reincarnating.

Ever since she used [Death Rewind] for the first time, those indescribable, malformed, corrupted monsters have appeared around her again and again, tearing her apart and devouring her.

On her twenty-first rewind, Tsubaki Yui finally found a way to break the cycle

At her parents' funeral, the Geto family, distant relatives, adopted her.

Her powerful, gentle older brother, a boy named Geto Suguru, rescued her from fear and pain like a hero.

"If I married this boy, maybe I could live safely, even in such a terrifying world."

That's what Tsubaki Yui once thought.

She could no longer live without Suguru, and couldn't imagine facing this terrible world alone. Dying was just... too painful.

While Tsubaki Yui was still making plans to marry Geto Suguru when she came of age, the older brother who had pulled her through twenty-two cycles of death stabbed her through the heart.

The boy pursued her relentlessly, trying to kill her. He chased her through the streets, at school, and even at his parents' funeral.

But Tsubaki Yui cannot die. Even if the strongest person in the world dies, she will not.

*

The ability belongs to 486; the heroine is an ordinary person.

Premise: Have the courage to save others