When Being a Saint Can't Save the World

Before she transmigrated into a book, Han Shuang always dreamed of being a saintly do-gooder.

After she transmigrated into a book, Han Shuang started over, worked hard at cultivation, and even rescued the original story's villain along the way, turning an indiscriminate, world-destroying Big Boss into a kind little ray of sunshine.

At seventeen, she reached the Deification realm and became the sect's young master, rising to the pinnacle of life. She even had her childhood friend, her junior apprentice brother, by her side. Beauty in her arms, how wonderful...

And then she got carried away.

In pursuit of her saintly dream, she impulsively decided to stop a war that was about to break out in the original story.

Predictably, she failed.

Han Shuang, young master of the Mingcang Realm, is cruel by nature. For her own selfish desires, she ignited war among the three lands of Zhaotian Domain, wreaking havoc across Zhaotian...

Knowing the depth of her crimes, she took her own life at Jiayun Mountain.

She thought that was the end of it, but when she was reborn, she became a cannon-fodder supporting heroine in the original story.

Fine, she could be cannon fodder. She was genuinely too tired to keep trying. She'd just lie low on Bihua Mountain and survive one day at a time.

It was a lovely idea, but reality was cruel.

On a trip down the mountain, she accidentally got caught up in the conflict in the Mingcang Realm. Then she saw that her gentle, sweet junior apprentice brother was actually the one behind the war!

Wait, what? Can someone tell her how the kind junior apprentice brother she'd worked so hard to raise turned back into a villain?

Han Shuang was speechless. Han Shuang broke down. Han Shuang coughed up blood...

Chaotic, sarcastic, peerless genius heroine x dark, ghostly, mentally ill villain hero

P.S.:

1. This is a slow burn, and the hero appears relatively late.

2. There are many flashbacks interspersed with the present-day timeline.

3. Neither lead is a morally upright, selfless hero.

4. The leads are each other's first and only, but the heroine has had feelings for someone else before.

Theme: Love peace