Within a Hollow Heart - Chapter 21: Volume 1, : "Shattered Threads"

Fade was a legendary assassin that could kill just about anyone, as long as the price was right and the reason was just.

One day as he was reminiscing about his life when he lost someone important, he fell asleep. When he woke up he was in a weird place, a different body, a different world.

“Please... give me a baby.”His eyes cut like sharp blades: “Even if it's with your husband's own brother?”I nod, trembling.To save my dying husband, I would cross any line.What started as a deal spun out of control in the darkness.“Look at me,” he grips my chin. “What are you craving?”I shake my head, biting my lip as tears fall.“You want this...” his lips brush mine, “you want me.”

As the number one pill alchemist of the immortal world, Mu Chen had always believed that it was because he had single-mindedly focused on concocting pills that led to him to neglect disciplining his disciple. Which in turn, caused his disciple to be led astray by the seduction of devil cultivation, leading to the three realms to fall to disaster. After his rebirth, Mu Chen resolved to properly teach his disciple, give him the very best resources, earnestly love him, carry him close to his heart, teach him by way of example, and didn’t let him grow corrupt.

Sure enough, his disciple became more and more “intimate”. Every day his disciple even crawled into his bed, rubbing against his chest and clinging to his thigh. It was just that his expression isn’t exactly quite right……

- Description from novelupdates

As the head disciple of the number one sect in the world, Luo Jianqing had a brilliant reputation. He was the most respected senior brother of his junior brothers and sisters: the last disciple of the cultivation world’s number one cultivator, Luo Jianqing greatly respected his master’s teachings, not crossing his limits by even half a step.

Afterwards…… he was stabbed to death just like that by the main character with his sword. His master’s sword.
Luo Jianqing: “……”
The heavens wants me dead, yet I refuse to die! See if the will of the heavens is more fearsome, or if the will of my sword is more stubborn!

Wu Yin: “Jianqing, I have something to say to you.”
Luo Jianqing: “Master, I also have something to say to you.”
Wu Yin: “… you speak first?”
Luo Jianqing: “You speak first.”
Wu Yin: “I like you.” / Luo Jianqing: “I want to top you.”
Wu Yin: “……”

- Description from Novelupdates