Don: The Blood Chains - Chapter 16: Betrayal.

Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates

“I love you, Brys,” Storm whispered.“Love?” I scoffed. “Do you even know what love is?” I raised a brow at him.“Of course, I do. I love you, Brys,” he repeated as he leaned closer to kiss me. “I've had feelings for—”The words died on his lips. His eyes grew wide in shock as blood spluttered from his lips. “Wh... What did you just do?” His gaze went down to the knife I drove deep into his chest.“What's wrong, Storm?” I smirked. “Don't you love me anymore?” I mocked.Though it hurts me to do what I did, I had to do so, for my safety.If I don't kill him now, he won't hesitate to do the same to me, in the future...*****Mega, a nerd who is obsessed with reading novels and comics, ended up reading a comic that sent his blood boiling. He cursed the omega in the book who was so pitiful that the Alpha used him only to kill him when he felt the omega was useless.Unfortunately, Mega had an accident on his way on an errand, and by a sheer stroke of luck, he found himself in the same trashy comic.And what was more?He discovered that he now resides in the body of the omega who was abused by the Alpha he admired.Now, he's determined to turn his fate even if it means going against the plot, and his stupid system.He was determined not to make the same mistake his former host had...

Luo Ling, an expert in the art of disguise, was bound to a System and was eager to begin his task.

As a result, before even successfully completing a mission, he got married!

At a 36 degree angle, Luo Ling sorrowfully looked up into space: “Tong’er, tell me, do I still have a chance to free myself?”

System: “… Your man is behind you.”

Luo Ling: “!!!”

The person who arrived, gathered Luo Ling in his arms, hugging him from behind as he said in a bewitchingly dangerous tone: “Based on your thoughts, it seems that I have not given you enough love. So let’s proceed in exploring ways to continue a new life.”

- Description from Novelupdates

In the Sky Sword Continent there are thousands of sects and strong cultivators as common as trees. In order to prevent his older sister from being forcefully married off, Lu Xuan had no choice to but to unceasingly cultivate and enter a sect to ask for a favor. By chance, a sword-shaped crystal of mysterious origins entered into Lu Xuan’s body, containing countless top-class martial skills, powerful martial arts, and everything you could wish for! A martial legend starts here…