The Sickly Beauty Is Tired of Life and Becomes an Immortal

He Liansheng, a modern-day businessman widely known as a ruthless profiteer, was diagnosed with stomach cancer and depression.

After a failed suicide attempt, he transmigrated to the cultivation world.

Even in a different world, He Liansheng remained determined to kill himself.

But why had he failed after trying hundreds of times?!

He Liansheng expressionlessly tossed aside the shoddy knife, then suddenly saw an exceptionally beautiful woman give him a deceptively charming smile.

She... really looked like a swindler.

He Liansheng instantly became interested.

Gu Ling was the cultivation world's greatest formation master, a cold-blooded demonic cultivator of notorious fame.

He had devoted his entire life to laying a series of interlocking formations, hundreds of them joined together. Only someone who saw through their illusions and had the courage to commit suicide could break through.

For hundreds of years, everyone who came to challenge the formations had become nourishment for them.

Then one day, a weakling entered the formations. He was sick, coughing up blood every three steps, and had nothing going for him except his face.

Just as Gu Ling was sneering at him, the weakling broke through hundreds of formations!

Swallowing the curse that had nearly escaped his lips, Gu Ling smiled. "I can see that, young friend, you have excellent natural talent. Why not become my disciple?"

At last, he had a lab rat for his experiments.

A world-weary, sickly beauty of an attacker with a cloying, teasing manner x an exceptionally beautiful, scheming drama queen of a recipient

I would also like to recommend My Masochistic Protagonist Attacks the Villainous Boss.

Hua Yusui was a CEO at the very top of the modern food chain, ruthless and cunning. Countless people had fallen at his hands.

Then one day, he no longer wanted to live, and killed himself.

Everyone: Hahahaha, this is so great! The great demon Hua is finally dead!

But Hua Yusui transmigrated into a book, becoming the recipient who shared his name in a cultivation-world angst novel. The first, second, third, and nth male leads all looked down on him.

Hua Yusui (smiling): Heh, suddenly I don't want to die anymore.

Mo Shirong was a great demon reborn to cultivate anew. He had thought his heart was made of stone, but the sight of a young man glancing back after killing someone and wiping the blood from his sword stole his heart.

And then... the gravely wounded Mo Shirong was pinned down by the young man, who had lost his mind.

His first love ended in heartbreak, and Mo Shirong decided to kill the young man.

But seeing the young man surrounded by danger at every turn, constantly scheming, he couldn't help but feel for him.

So being pinned down once turned into being pinned down again and again.

A ruthless, sickly beauty of an attacker x a seemingly innocent but secretly sinister demonic big shot

Theme: Be sincere in how you treat others.