Celestial Bloodline - Chapter 13: Absent?

What is my 1000-year-old monster self to do when I’ve failed my immortal ascension? Time travel — accidentally — and wind up back in my 9-year-old body, needing to re-cultivate, of course. But after that? Get REVENGE! Muahahahaha! But the idiot who killed me — also accidentally — was the main character of the dumb harem Xianxia I transmigrated into. But wait. Wasn’t he only 7 or 8 at this point in time? Well, since I can’t harm a child or the main character without suffering in some way, then I’ll just have to raise him better, faster, stronger, and loyal! Muahahahaha!

When Yuan Zhi met Song Jiyun for the first time, Song Jiyun was conspiring with her brother-in-law to take over the family business;

When Yuan Zhi met Song Jiyun for the second time, Song Jiyun was planting and framing others with her breast brother;

When Yuanzhi met Song Jiyun for the third time, Song Jiyun’s breast brother was no longer by her side, but she was winking at his good brother…

Scholars can bear it, but he can’t bear it. Yuan Zhi decided… to feed the tiger with his body, and took Song Jiyun, a demon girl!

- Description from novelbuddy

Su Qiuge transmigrated into a novel and became the villain’s cannon fodder younger sister who was constantly courting disaster.

Not only did her brother dislike her, but she also offended her brother’s sworn enemy, the male lead.

After she transmigrated, Su Qiuge decided to curry favor with the male lead so that he would abandon his plans of revenge against her. She wanted to transform her cannon fodder fate and became an obscure passerby in his life instead.

Her plans were going smoothly, until one day she saw the aloof and cold male lead staring at her with a terribly dark gaze full of possessive desire.

Su Qiuge:?? Male lead wake up! I’m the cannon fodder!

Later she realized that the male lead who seemed like a good student was actually black-bellied and full of unspeakable intentions towards her.

When Simon dies, it turns out there's more to combat than lightning reflexes with his controller, and the path to becoming a hero is more brutal than he can imagine as he descends into The Pit. Death after Death is a dark, time loop/Isesaki story with roguelike elements, that explores some of the common tropes in a different light.